Problem

If you execute a vb script which use SQL-DMO on SQL Server 2008, you will notice that the script doesn’t work at all.

You will see the error message as similar to this one when you execute the vb script:

Error: ActiveX component can’t create object: ‘SQLDMO.SQLServer’
Code: 800A01AD
Source: Microsoft VBScript runtime error

Cause

This is because SQLDMO is deprecated since SQL Server 2005. But SQLDMO is installed on SQL Server 2005 by default so you can run a vb script which uses SQLDMO without any error on SQL Server 2005. On SQL Server 2008, SQLDMO is not installed by default . If you want to use SQLDMO, you have to install it manually.

Solution

To use SQL-DMO on SQL Server 2008, you need to download and install Microsoft SQL Server 2005 Backward Compatibility Components to solve the problem. You can go to Microsoft Download Center and search for “Microsoft SQL Server 2008 Feature Pack” and sort by Release Date to find the latest version. Or you can download at Linglom’s Download Page.

Step-by-step

1. Download Microsoft SQL Server 2005 Backward Compatibility Components. Next, execute the setup file.
2. On Welcome to the Install Wizard for Microsoft SQL Server 2005 Backward compatibility Setup, click Next.
   
3. On License Agreement, select ‘I accept the terms in the license agreement‘. Then, click Next.
   
4. On Registration Information, enter your personal information. Then, click Next.
   
5. On Feature Selection, ensure that SQL Distributed Management Objects is selected. Then, click Next.
   Note: SQL-DMO is the feature that is require to run a vb script that uses DMO.
   
6. On Ready to Install the Program, click Install.
   
7. Installing Microsoft SQL Server 2005 Backward compatibility.
   
8. On Completing the Microsoft SQL Server 2005 Backward compatibility Setup, click Finish. Now try to run vb script again, the problem should be gone!
   

Reference

Where the Heck is DMO?

No related posts.

Export Data Wizard

On Part 1: Introduction, I mentioned about error messages when you try to restore a database from SQL Server 2008 to SQL Server 2005. You can see the first solution at Part 2: Generate SQL Server Scripts Wizard. Now let’s see the second solution to solve the problems.

On this post, you see how to export tables on ‘Northwind’ database from SQL Server 2008 to SQL Server 2005 using export data wizard.

Step-by-step

1. On Microsoft SQL Server Management Studio, connects to SQL Server 2008. Right-click on the database that you want to export data -> select Tasks -> Export Data.
   
2. On Welcome to SQL Server Import and Export Wizard, click Next.
   
3. On Choose a Data Source, select the source from which to copy data. Set Data source to SQL Server Native Client 10.0. Verify that Server name is the source of SQL Server 2008 that you want and select Database as ‘Northwind’. Click Next.
   
4. On Choose a Destination, specify where to copy data to. Set Destination to SQL Server Native Client 10.0. Type the Server name to the destination of SQL Server 2005 that you want. You can also click Refresh to verify if you can connect to the specify server name. Currently, I don’t have ‘Northwind’ database on SQL Server 2005 so I will create a new one, click New.
   
5. On Create Database, type name as ‘Northwind’ and click OK.
   
6. Back to Choose a Destination, I have created ‘Northwind’ database so select it as Database. Click Next.
   
7. On Specify Table Copy or Query, select Copy data from one or more tables or views and click Next.
   
8. On Select Sources Tables and Views, select tables that you want to export. On this example, I select all tables on ‘Northwind’ database.
   
9. On Save and Run Package, click Next.
   
10. On Complete the Wizard, you can verify the choices made in the wizard. Then, click Finish.
    
11. Wait until the wizard finishes execution.
    
12. Now I have exported tables of ‘Northwind’ database from SQL Server 2008 to SQL Server 2005 successfully.
    

Related posts:

1. Restore Database From SQL Server 2008 to SQL Server 2005, Part 2: Generate SQL Server Scripts Wizard
2. Restore Database From SQL Server 2008 to SQL Server 2005, Part 1: Introduction
3. How to backup and restore database on Microsoft SQL Server 2005

Generate SQL Server Scripts Wizard

On Part 1: Introduction, I mentioned about error messages when you try to restore a database from SQL Server 2008 to SQL Server 2005. Now let’s see a first solution to solve the problems.

On this post, you see how to backup ‘Northwind’ database by generate a SQL Server script on SQL Server 2008. Then, restore the ‘Northwind’ database by execute the SQL Server script on SQL Server 2005.

Step-by-step

1. On Microsoft SQL Server Management Studio, connects to the SQL Server 2008. Right-click on the database that you want to backup and select Tasks -> Generate Scripts.
   
2. On Welcome to the Generate SQL Server Scripts Wizard, click Next.
   
3. On Select Database, select Northwind and check Script all objects in the selected database. Then, click Next.
   
4. On Choose Script Options, set Script Database Create to False and Script for Server Version to SQL Server 2005.
   Note: You can set Script Database Create to True if your source and destination for store database files are the same location.
   
5. Continue on Choose Script Options, scroll down and set Script Data to True. Click Next
   Note: Set this option to true to include data on each table to a script.
   
6. On Output Option, select a destination for the output script. Select Script to file and browse to the location that you want. Click Next.
   
7. On Script Wizard Summary, you can review your selections. Then, click Finish.
   
8. On Generate Script Progress, the wizard is creating a SQL Server script.
   
9. When the script has been completed, you see the output file as similar the figure below.
   
10. Connect to SQL Server 2005, create a new database. Right-click Database -> New Database.
    Note: If you have set Script Database Create to True on step 4, you don’t have to create a database manually.
    
11. Type ‘Northwind’ as database name. Click OK.
    
12. Execute the SQL Server script file that you have created.
    
13. Now the database ‘Northwind’ is restored on SQL Server 2005.
    

Related posts:

1. Restore Database From SQL Server 2008 to SQL Server 2005, Part 3: Export Data Wizard
2. Restore Database From SQL Server 2008 to SQL Server 2005, Part 1: Introduction
3. How to backup and restore database on Microsoft SQL Server 2005

Problem

When you restore or attach a database which is created from SQL Server 2008 to SQL Server 2005 or SQL Server 2000, you will see some error messages as the examples below.

Backup and Restore

You have backup a database from SQL Server 2008. If you try to restore the backup database file to SQL Server 2005, you will receive the error message:

An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo)
Additional information:
-> The media family on device ‘the backup file‘ is incorrectly formed. SQL Server cannot process this media family.
RESTORE HEADERONLY is terminating abnormally. (Microsoft SQL Server, Error: 3241)

Detach and Attach

You have detach a database from SQL Server 2008. If you try to attach the detached database file to SQL Server 2005, you will receive the error message:

Attach database failed for Server ‘SQL Server name’. (Microsoft.SqlServer.Smo)
Additional information:
-> An exception occurred while executing a Transact-SQL statement batch. (Microsoft.SqlServer.ConnectionInfo)
–> The database ‘database name’ cannot be opened because it is version 655. This server supports version 611 and earlier. A downgrade path is not supported.
Could not open new database ‘database name’. CREATE DATABASE is aborted. (Microsoft SQL Server, Error: 948)

Solution

These problems occur because a backup or detach database file is not backward compatible. You cannot restore or attach a database which is created from a higher version of SQL Server to a lower version of SQL Server.

But there are some alternatives which can help you to restore a database to a lower version of SQL Server. I divide into separate parts.

1. Part 2: Generate SQL Server Scripts Wizard. The solution creates a SQL Server script file using a wizard. Then, you simply execute the script file on SQL Server 2005 or SQL Server 2000. So you will get everything as same as the source database on the destination. But there are some disadvantages:
   • If the source database contains lots of data, you will have a large script file.
   • The generated file is a plain text. Anyone who has access to the file can read it. So you should delete the script file after the restoration.
2. Part 3: Import and Export Wizard. This solution exports data to the targeted SQL Server using a wizard. It is more secure and effective than the first solution. But you can only export tables and views only.

Related posts:

1. Restore Database From SQL Server 2008 to SQL Server 2005, Part 2: Generate SQL Server Scripts Wizard
2. Restore Database From SQL Server 2008 to SQL Server 2005, Part 3: Export Data Wizard
3. How to backup and restore database on Microsoft SQL Server 2005

Problem

You have backup a database on SQL Server 2005. Then, you try to restore the backup file on an existing database and receive the error message below:

Restore failed for Server ‘SQL Server name‘. (Microsoft.SqlServer.Smo)
Additional information:
System.Data.SqlClient.SqlError: The backup set holds a backup of a database other than the existing ‘dbName‘ database. (Microsoft.SqlServer.Smo)

This error message indicates that you are going to restore a database on another database which are not the same database. For example, you have backup Northwind database and try to restore the backup to AdventureWorks database, the error will occur.

Solution

To solve the problem, you can use the overwrite the existing database option while you’re restoring.

1. On Restore Database, select Options tab on the left menu. Then, check Overwrite the existing database on Restore options.
   Note: This option will overwrite any existing data on the targeted database.
   
2. Try to restore the database, the problem should be gone now.
   

Note: you can also delete the targeted database before perform restore a database. This way also gives the result as same as the solution above.

Related posts:

1. [Solved] System.Data.SqlClient.SqlError: The tail of the log for the database “dbName” has not been backed up
2. How to backup and restore database on Microsoft SQL Server 2005

Problem

You have backup a database on SQL Server 2005. Then, you try to restore the backup file on the existing database and receive the error message below:

Restore failed for Server ‘SQL Server name‘. (Microsoft.SqlServer.Smo)
Additional information:
System.Data.SqlClient.SqlError: The tail of the log for the database “dbName” has not been backed up. Use BACKUP LOG WITH NORECOVERY to backup the log if it contains work you do not want to lose. Use the WITH REPLACE or WITH STOPAT clause of the RESTORE statement to just overwrite the contents of the log. (Microsoft.SqlServer.Smo)

This error message is likely to be a warning message rather than an error message. It indicates that you are going to restore a database to replace the existing database and some data may be lose. For example, you perform backup on this following schedule:

• database at 10:00 AM
• transaction log at 11:00 AM
• transaction log at 01:00 PM

Now if you are going to restore the backup at 04:00 PM. You will lose any work after 01:00 till 04:00 which is same as the error message above try to warn you.

Solution

To solve the problem, you can either:

• Replace the existing database with a backup file. This option is fast and easy but you will lose any work after the last backup has been performed.
• Do backup transaction log again with NORECOVERY option before restoring a database. With NORECOVERY option, the database will be in restoring state and waiting for restoration.

In this post, I will show only the first solution only. For the second solution, see How to: Back Up the Tail of the Transaction Log (SQL Server Management Studio)

Restore by overwrite an existing database

1. On Restore Database, select Options tab on the left menu. Then, check Overwrite the existing database on Restore options.
   Note: This option will overwrite any existing data on the targeted database.
   
2. Try to restore the database, the problem should be gone now.
   

Related posts:

1. [Solved] System.Data.SqlClient.SqlError: The backup set holds a backup of a database other than the existing ‘dbName’ database

Introduction

Last time, I wrote an article show how to enable remote connection on SQL Server 2005 Express. Now SQL Server 2008 Express is released for a while, it doesn’t allow remote connection on default installation as on SQL Server 2005 Express. So you have to enable it manually.

If you’re trying to connect to SQL Server 2008 Express remotely without enable remote connection first, you may see these error messages:

• “Cannot connect to SQL-Server-Instance-Name
  An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 28 – Server doesn’t support requested protocol) (Microsoft SQL Server)”
  
• “Cannot connect to SQL-Server-Instance-Name
  An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: SQL Network Interfaces, error: 26 – Error Locating Server/Instance Specified) (Microsoft SQL Server)”
  
• “Cannot connect to SQL-Server-Instance-Name
  Login failed for user ‘username‘. (Microsoft SQL Server, Error: 18456)”
  

To enable remote connection on SQL Server 2008 Express, see the step below:

1. Start SQL Server Browser service if it’s not started yet. SQL Server Browser listens for incoming requests for Microsoft SQL Server resources and provides information about SQL Server instances installed on the computer.
2. Enable TCP/IP protocol for SQL Server 2008 Express to accept remote connection.
3. (Optional) Change Server Authentication to SQL Server and Windows Authentication. By default, SQL Server 2008 Express allows only Windows Authentication mode so you can connect to the SQL Server with current user log-on credential. If you want to specify user for connect to the SQL Server, you have to change Server Authentication to SQL Server and Windows Authentication.

Note: In SQL Server 2008 Express, there isn’t SQL Server Surface Area Configuration so you have to configure from SQL Server Configuration Manager instead.

Step-by-step

1. Open SQL Server Configuration Manager. Click Start -> Programs -> Microsoft SQL Server 2008 -> Configuration Tools -> SQL Server Configuration Manager.
   
2. On SQL Server Configuration Manager, select SQL Server Services on the left window. If the state on SQL Server Browser is not running, you have to configure and start the service. Otherwise, you can skip to step 6.
   
3. Double-click on SQL Server Browser, the Properties window will show up. Set the account for start SQL Server Browser Service. In this example, I set to Local Service account.
   
4. On SQL Server Browser Properties, move to Service tab and change Start Mode to Automatic. Therefore, the service will be start automatically when the computer starts. Click OK to apply changes.
   
5. Back to SQL Server Configuration Manager, right-click on SQL Server Bowser on the right window and select Start to start the service.
   
6. On the left window, expand SQL Server Network Configuration -> Protocols for SQLEXPRESS. You see that TCP/IP protocol status is disabled.
   
7. Right-click on TCP/IP and select Enable to enable the protocol.
   
8. There is a pop-up shown up that you have to restart the SQL Service to apply changes.
   
9. On the left window, select SQL Server Services. Select SQL Server (SQLEXPRESS) on the right window -> click Restart. The SQL Server service will be restarted.
   
10. Open Microsoft SQL Server Management Studio and connect to the SQL Server 2008 Express.
    
11. Right-click on the SQL Server Instance and select Properties.
    
12. On Server Properties, select Security on the left window. Then, select SQL Server and Windows Authentication mode.
    
13. Again, there is a pop-up shown up that you have to restart the SQL Service to apply changes.
    
14. Right-click on the SQL Server Instance and select Restart.
    
15. That’s it. Now you should be able to connect to the SQL Server 2008 Express remotely.

Related posts:

1. Enable remote connection to SQL Server 2005 Express
2. How to Enable Remote Desktop Web Connection on Windows

Introduction

When you create a store procedure on Microsoft SQL Server with some input parameters, sometimes you don’t want to assign all of parameters (optional parameters) so you need to specify default value for the parameters. Otherwise, it shows error when execute the store procedure.

Let’s see some example, I have created a new store procedure to query product name from Northwind database which require 2 input parameters. The script to create a sample store procedure is below:

CREATE PROCEDURE sp_getproduct
		(@UnitPrice money,
		 @UnitsInStock smallint = '10')
AS
BEGIN
	SET NOCOUNT ON;
 
	SELECT [ProductName] FROM Products
		WHERE ([UnitPrice] < @UnitPrice) AND
			  ([UnitsInStock] > @UnitsInStock)
END
GO

So as long as I specify both input parameters, the query is OK.

But if I miss an input parameter, the error will be shown as the figure below:

Solution

1. You can define the default value for parameters to avoid this error message. The default value generally is NULL. But you also can define other value as you want.
2. In this example, I’ve altered the store procedure by assign default value for these parameters to be NULL and also in WHERE clause.

   ALTER PROCEDURE sp_getproduct
   		(@UnitPrice money = NULL,
   		 @UnitsInStock smallint = NULL)
   AS
   BEGIN
   	SET NOCOUNT ON;
    
   	SELECT [ProductName] FROM Products
   		WHERE ((@UnitPrice IS NULL) OR ([UnitPrice] < @UnitPrice)) AND
   			  ((@UnitsInStock IS NULL) OR ([UnitsInStock] > @UnitsInStock))
   END
   GO

   Code Explanation:

   • I’ve altered the parameters declaration to assign the NULL value as the default value.

     		(@UnitPrice money = NULL,
     		 @UnitsInStock smallint = NULL)

   • Next, I’ve altered in WHERE clause to be TRUE if the parameters are NULL. So if the both parameters are NULL, the SELECT statement will return all ProductName from Products table.

     		WHERE ((@UnitPrice IS NULL) OR ([UnitPrice] < @UnitPrice)) AND
     			  ((@UnitsInStock IS NULL) OR ([UnitsInStock] > @UnitsInStock))

   

3. Re-execute the query again, you’ll see the error message is gone.
   

No related posts.

Introduction

This part contents mostly concerns coding on VB.NET which will interacts with SQL server on pubs database. The sample database can be download at SQL2000SampleDb. You do not need to complete Part I before.

Topics

1. Define a connection string
2. Query table sales by year
3. Call a store procedure
4. Get return value from store procedure
5. Get return values from store procedure
6. Using max, min, and average

Let’s start

1. Define a connection string module

   Create new VB.NET Windows Application project and add new module to the project for add a connection string to SQL server. You need to alter this string to match your environment and keep database pointing to pubs.

   Module Module1
       Public Sqlcon As String = "Server=BKKSQL2005;uid=sa;password=123456;database=pubs"
   End Module

   

Back to top

2. Query table sales by year

   Design form1.vb

   • Back to form1.vb.
   • Add new Textbox as TextBox1, TextBox2, TextBox3, TextBox4 and TextBox5 to the form.
   • Add new Button as Button1 and Button2 to the form.
   • Add DataGridView to the form.

   

   Coding form1.vb

   • Add code below on this form.

   Imports System.Data.SqlClient

   • Double click Button1 and put below code into it.

           Dim strsql As String = "select title_id "
           For i As Integer = CInt(TextBox1.Text) To CInt(TextBox2.Text)
               strsql &= ", sum(case year(ord_date) when " & i & " then qty else 0 end) as Y" & i
           Next
           strsql &= " from sales group by title_id with rollup"
    
           Dim DA As New SqlDataAdapter(strsql, Module1.Sqlcon)
           Dim DT As New DataTable
           DA.Fill(DT)
    
           Dim str1 As String = ""
           For j As Integer = 1 To DT.Columns.Count - 1
               Dim dc As DataColumn = DT.Columns(j)
               If str1 <> "" Then str1 = str1 & "+"
               str1 = str1 & dc.ColumnName
           Next
    
           DT.Columns.Add("Sum1", GetType(Integer), str1)
    
           Dim dr As DataRow = DT.Rows(DT.Rows.Count - 1)
           dr(0) = "Total"
           DataGridView1.DataSource = DT

   • Try compile and run the project, enter ’1992′ on TextBox1 as start year and ’1994′ on TextBox2 as end year and click the ‘View by Year’ button. You’ll see the result as below.

   

   • You can download source code at here – TrainingSQL1.zip

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3. Call a store procedure

   This example will modify code from previous example and you need a store procedure ‘test_a’ which can be found in Part I or download sql to create a procedure at here – test_a.sql

   There are 3 different coding styles that will give the same result for calling store procedure. The example will try to call a store procedure ‘test_a’ which receive two inputs (start year and end year).

   From previous Form1, modify Button1_Click event to be one of these code.

   1. Sending parameters along with execute string.

              Dim strsql As String = "exec test_a '" & TextBox1.Text & "', '" & TextBox2.Text & "'"
              Dim DA As New SqlDataAdapter(strsql, Module1.Sqlcon)
              Dim DT As New DataTable
              DA.Fill(DT)
              DataGridView1.DataSource = DT

   2. Sending parameters by adding as SqlParameters.

              Dim cn As New SqlConnection(Module1.Sqlcon)
              Dim cmd As New SqlCommand("test_a", cn)
              cmd.CommandType = CommandType.StoredProcedure
              Dim P1 As SqlParameter = cmd.Parameters.Add("@Year1", SqlDbType.NVarChar)
              P1.Value = TextBox1.Text
              P1 = cmd.Parameters.Add("@Year2", SqlDbType.NVarChar)
              P1.Value = TextBox2.Text
       
              Dim DA As New SqlDataAdapter(cmd)
              Dim dt As New DataTable
              DA.Fill(dt)
              DataGridView1.DataSource = dt

   3. Using OleDB

      Imports System.Data.OleDb
      .
      .
              Dim cn As New OleDbConnection("Provider=SQLOLEDB;" & Module1.Sqlcon)
              Dim cmd As New OleDbCommand("{call test_a (?,?)}", cn)
              Dim P1 As OleDbParameter = cmd.Parameters.Add("@Year1", OleDbType.VarWChar)
              P1.Value = TextBox1.Text
              P1 = cmd.Parameters.Add("@Year2", OleDbType.VarWChar)
              P1.Value = TextBox2.Text
              Dim DA As New OleDbDataAdapter(cmd)
              Dim dt As New DataTable
              DA.Fill(dt)
              DataGridView1.DataSource = dt

   The result will look like previous example. You can download the modified source code at here – TrainingSQL2.zip.
   

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4. Get return value from store procedure

   There are 3 different coding styles as like in previous example. Modify source in Form1.Button1_Click method with the following code again.

   1. Sending parameters along with execute string

              Dim strsql As String = "declare @i int exec @i = test_a '" & TextBox1.Text & "', '" & TextBox2.Text & "' select @i as num1"
              Dim DA As New SqlDataAdapter(strsql, Module1.Sqlcon)
              Dim DS As New DataSet
              DA.Fill(DS)
              DataGridView1.DataSource = DS.Tables(0)
              Dim i As Integer = DS.Tables(1).Rows(0)("num1")
              MsgBox(i)

   2. Sending parameters by using SqlParameter

              Dim cn As New SqlConnection(Module1.Sqlcon)
              Dim cmd As New SqlCommand("test_a", cn)
              cmd.CommandType = CommandType.StoredProcedure
              Dim P2 As SqlParameter = cmd.Parameters.Add("@Return", SqlDbType.Int)
              P2.Direction = ParameterDirection.ReturnValue
              Dim P1 As SqlParameter = cmd.Parameters.Add("@Year1", SqlDbType.NVarChar)
              P1.Value = TextBox1.Text
              P1 = cmd.Parameters.Add("@Year2", SqlDbType.NVarChar)
              P1.Value = TextBox2.Text
              Dim DA As New SqlDataAdapter(cmd)
              Dim dt As New DataTable
              DA.Fill(dt)
              DataGridView1.DataSource = dt
              MsgBox(P2.Value)

   3. Using OleDB

              Dim cn As New OleDbConnection("Provider=SQLOLEDB;" & Module1.Sqlcon)
              Dim cmd As New OleDbCommand("{? = call test_a (?,?)}", cn)
              Dim P2 As OleDbParameter = cmd.Parameters.Add("@Return", OleDbType.Integer)
              P2.Direction = ParameterDirection.ReturnValue
              Dim P1 As OleDbParameter = cmd.Parameters.Add("@Year1", OleDbType.VarWChar)
              P1.Value = TextBox1.Text
              P1 = cmd.Parameters.Add("@Year2", OleDbType.VarWChar)
              P1.Value = TextBox2.Text
              Dim DA As New OleDbDataAdapter(cmd)
              Dim dt As New DataTable
              DA.Fill(dt)
              DataGridView1.DataSource = dt
              MsgBox(P2.Value)

   The result will look like previous example but add a pop-up message box the return value from the store procedure. You can download the source code at here – TrainingSQL3.zip.
   

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5. Get return values from store procedure

   This example, you need a store procedure ‘test_a2’ which can be found here – test_a2.sql. This store procedure receives two inputs as the store procedure ‘test_a’ but it returns more additional values which are @sum1, @avg1 and a return value.
   There are 3 different coding styles as like in previous example. Modify source in Form1.Button1_Click method with the following code again. The additional values that are returned from the store procedure will be place into TextBox3, TextBox4 and TextBox5.

   1. Sending parameters along with execute string

              Dim strsql As String = "declare @i int,@j int, @k int exec @i = test_a2 '" & TextBox1.Text & "', '" & TextBox2.Text & "',@j out, @k out select @i as num1,@j,@k"
              Dim DA As New SqlDataAdapter(strsql, Module1.Sqlcon)
              Dim DS As New DataSet
              DA.Fill(DS)
              DataGridView1.DataSource = DS.Tables(0)
              Dim dr As DataRow = DS.Tables(1).Rows(0)
              TextBox3.Text = dr(0)
              TextBox4.Text = dr(1)
              TextBox5.Text = dr(2)

   2. Sending parameters by using SqlParameter
      Note: The parameter’s name must match as in the store procedure.

              Dim cn As New SqlConnection(Module1.Sqlcon)
              Dim cmd As New SqlCommand("test_a2", cn)
              cmd.CommandType = CommandType.StoredProcedure
              Dim P2 As SqlParameter = cmd.Parameters.Add("@Return", SqlDbType.Int)
              P2.Direction = ParameterDirection.ReturnValue
              Dim P1 As SqlParameter = cmd.Parameters.Add("@Year1", SqlDbType.NVarChar)
              P1.Value = TextBox1.Text
              P1 = cmd.Parameters.Add("@Year2", SqlDbType.NVarChar)
              P1.Value = TextBox2.Text
              Dim P3 As SqlParameter = cmd.Parameters.Add("@sum1", SqlDbType.Int)
              P3.Direction = ParameterDirection.Output
              Dim P4 As SqlParameter = cmd.Parameters.Add("@avg1", SqlDbType.Int)
              P4.Direction = ParameterDirection.Output
              Dim DA As New SqlDataAdapter(cmd)
              Dim dt As New DataTable
              DA.Fill(dt)
              DataGridView1.DataSource = dt
              TextBox3.Text = P2.Value
              TextBox4.Text = P3.Value
              TextBox5.Text = P4.Value

   3. Using OleDB

              Dim cn As New OleDbConnection("Provider=SQLOLEDB;" & Module1.Sqlcon)
              Dim cmd As New OleDbCommand("{? = call test_a2 (?,?,?,?)}", cn)
              Dim P2 As OleDbParameter = cmd.Parameters.Add("@Return", OleDbType.Integer)
              P2.Direction = ParameterDirection.ReturnValue
              Dim P1 As OleDbParameter = cmd.Parameters.Add("@Year1", OleDbType.VarWChar)
              P1.Value = TextBox1.Text
              P1 = cmd.Parameters.Add("@Year2", OleDbType.VarWChar)
              P1.Value = TextBox2.Text
              Dim P3 As OleDbParameter = cmd.Parameters.Add("@sum1", OleDbType.Integer)
              P3.Direction = ParameterDirection.Output
              Dim P4 As OleDbParameter = cmd.Parameters.Add("@avg1", OleDbType.Integer)
              P4.Direction = ParameterDirection.Output
              Dim DA As New OleDbDataAdapter(cmd)
              Dim dt As New DataTable
              DA.Fill(dt)
              DataGridView1.DataSource = dt
              TextBox3.Text = P2.Value
              TextBox4.Text = P3.Value
              TextBox5.Text = P4.Value

   The result will look like previous example but add a pop-up message box the return value from the store procedure. You can download the source code at here – TrainingSQL4.zip.
   

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6. Using max, min, and average

   This example shows how to using function max, min and average by compute from qty field on sales table.

   Design form2.vb

   • Add new form on the project.
   • Add new ListBox1 to the form.
   • Add DataGridView1, DataGridView2 and DataGridView3 to the form.

   

   Coding form2.vb
   Add below code to the form.

   Imports System.Data.SqlClient
    
   Public Class Form2
       Dim ds As New DataSet
       Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
           Dim strsql As String = "select stor_id,ord_num, qty from sales order by stor_id " & _
                               " compute max(qty),min(qty), avg(qty) by stor_id"
           Dim da As New SqlDataAdapter(strsql, Module1.Sqlcon)
    
           da.Fill(ds)
           'MsgBox(ds.Tables.Count)
           For Each dt As DataTable In ds.Tables
               ListBox1.Items.Add(dt.TableName)
           Next
           Dim dt3 As DataTable = ds.Tables(0).Clone
           Dim dt4 As DataTable = ds.Tables(1).Clone
           dt4.Columns.Add("Stor_id", GetType(Integer))
           For i As Integer = 0 To ds.Tables.Count - 1 Step 2
               Dim dt As DataTable = ds.Tables(i)
               Dim Stor_ID As Integer = dt.Rows(0)("stor_id")
               For Each dr As DataRow In dt.Rows
                   'dt3.ImportRow(dr)
                   Dim dr2 As DataRow = dt3.NewRow
                   dr2.ItemArray = dr.ItemArray
                   dt3.Rows.Add(dr2)
               Next
    
               Dim dr5 As DataRow = ds.Tables(i + 1).Rows(0)
               dt4.ImportRow(dr5)
               Dim dr4 As DataRow = dt4.Rows(dt4.Rows.Count - 1)
               dr4("stor_id") = Stor_ID
    
           Next
           DataGridView2.DataSource = dt3
           DataGridView3.DataSource = dt4
    
    
       End Sub
    
       Private Sub ListBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ListBox1.SelectedIndexChanged
           Dim DT As DataTable
           DT = ds.Tables(ListBox1.Text)
           DataGridView1.DataSource = DT
       End Sub
   End Class

   Change startup form on the project by right-click on the project’s name and select properties and change startup form from ‘Form1′ to ‘Form2′. Compile and run the project.
   

   You’ll see that on DataGridView1 will be changed when you change value on ListBox1. On DataGridView2 shows result from sql query command and DataGridView3 shows computed values (max, min and average) of each stor_id. You can download the source code at here – TrainingSQL5.zip.
   

   Back to top

Related posts:

1. SQL Server 2005 Training, Day 1, Part I

Introduction

This post shows a step-by-step guide to backup and restore a database between two Microsoft SQL Server 2005 instances. By using backup, you can backup a database without interrupt any transactions on the database.
In the example below, I will backup a database from SQL Server 2005 and restore the database to another SQL Server 2005 Express Edition.

Step-by-step

Backup a database.

Now I will backup AdventureWorks database on BKKSQL2005 which runs Microsoft SQL Server 2005 to a file.

1. Connect to source server. Open Microsoft SQL Server Management Studio and connect to BKKSQL2005.
2. Right-click on the AdventureWorks database. Select Tasks -> Backup…
   
3. On Back Up Database window, you can configure about backup information. If you’re not familiar these configurations, you can leave default values. Here are some short descriptions.
   1. Database – a database that you want to backup.
   2. Backup type – you can select 2 options: Full and Differential. If this is the first time you backup the database, you must select Full.
   3. Name – Name of this backup, you can name anything as you want.
   4. Destination – the file that will be backup to. You can leave as default. Default will backup to “C:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Backup”.
   5. Click OK to proceed backup.

   

4. Wait for a while and you’ll see a pop-up message when backup is finished.
   
5. Browse to the destination, you’ll see a backup file (.bak format) which you can copy to other server for restore in the next step. Default backup directory is “C:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Backup”.
   

Restore the database.

Next, I will restore the AdventureWorks database from a file that I’ve created above to BK01BIZ001 which runs Microsoft SQL Server Express Edition.

1. Copy the backup file from source server to destination server. I’ve copied into the same directory as source server.
   
2. Connect to destination server. Open Microsoft SQL Server Management Studio Express and connect to BK01BIZ001.
3. Right-click on Databases. Select Restore Database…
   
4. Restore Database window appears. On Source for restore, select From device and click [...] buttton to browse file.
5. On Specify Backup, ensure that Backup media is “File” and click Add.
   
6. On Locate Backup File, select the backup file. This is the backup file that was created in Backup a database section and was copied to this server. Click OK. OK.
   
7. Back to Restore Database window.
   1. On Destination for restore, select “AdventureWorks”.
      Note: If you haven’t added the backup file on Source before (step 4-6), you won’t see the database name on Destination.
   2. On Source for restore, check the box in front of the backup name (in Restore column).
   3. Click OK.

   

8. Wait until restore finish and there’ll be a pop-up message notify.
   
9. Now you’ll see the restored database on the destination SQL Server.
   

Related posts:

1. Restore Database From SQL Server 2008 to SQL Server 2005, Part 2: Generate SQL Server Scripts Wizard
2. Restore Database From SQL Server 2008 to SQL Server 2005, Part 3: Export Data Wizard
3. Restore Database From SQL Server 2008 to SQL Server 2005, Part 1: Introduction