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SQL Server 2000 Stored Procedure Programming
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TIP: If you double-click the error message in the Result pane, Query Analyzer returns the cursor to the line containing the error in the Query pane (most of the time). This is very useful when you are executing a long batch.
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Another advantage the Alter statement has over the Drop/Create approach is that the stored procedure remains intact after an unsuccessful attempt such as we produced in this example. 2. You can cancel the changes or remove the dashes and attempt execution again.
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The Create Stored Procedure Wizard
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Enterprise Manager contains an elaborate set of wizards that are designed to simplify database management, information transfer, replication, and physical design of database objects. Part of this set is the Create Stored Procedure Wizard. It can create simple stored procedures for inserting, deleting, and updating tables. To use it, follow these steps: 1. Select Tools | Wizards from the menu. Enterprise Manager displays the Select Wizard dialog. 2. Click the Database node and the program will display a list of wizards for the creation of database objects:
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3. Select Create Stored Procedure Wizard and the program displays the wizard s start screen.
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SQL Server 2000 Stored Procedure Programming
4. Click Next and the wizard prompts you to select the database:
5. Click Next and the program presents you with a list of tables in the database. The list contains three additional columns to enable you to specify which stored procedures you want to create. It is possible to create stored procedures for inserting, deleting, and updating records.
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6. Mark a couple of boxes and click Next. The wizard creates stored procedures for the specified operations. To record them in the database, you need to click Finish. You can also change their names or edit their contents.
7. Select a stored procedure and click Edit. The wizard displays a list of the fields in the table. The Select column controls which fields will be included in the stored procedure. In the case of stored procedures for Update and Delete operations, it
SQL Server 2000 Stored Procedure Programming
is possible to specify which field will be used in a Where clause as a key to filter records.
8. Click Edit SQL and the program displays the code for the stored procedure. Here you can change generated code. It is also possible to change the generated code after the stored procedure has been recorded in the database.
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TIP: One thing that I always do when I create a stored procedure in this way is to remove the name of the database from the statement. In a development environment, database names are often changed (for example, when you set up a test database), and the name of the database should not be hard-coded in the stored procedure. It should use objects from the current database, not from the database in which the stored procedure was created.
9. Click OK twice to close open windows, and then click Finish to record the stored procedures in the database. The Create Stored Procedure Wizard is not perfect, but it will help you to make your first stored procedures. Stored procedures created in this way are very simple, but performance-wise and security-wise it is much better to access data through such stored procedures than to go directly to the underlying tables.
TIP: I have to admit that I generate stored procedures using the wizard from time to time. If the underlying table has many columns, it is much faster to generate a stored procedure using the wizard than to type the stored procedure from scratch.
SUMMARY
You have made your first steps in the development of stored procedures in Transact-SQL. You have seen how to
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Connect to SQL Server from SQL Server Query Analyzer and SQL Server Enterprise Manager Execute stored procedures from Query Analyzer Create stored procedures using SQL Server Enterprise Manager, SQL Server Query Analyzer, and the Create Stored Procedure Wizard Edit stored procedures Make and fix syntax errors Open SQL Server Books Online
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