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Generating a T-SQL Statement
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If you don t know how to use T-SQL, building T-SQL statements can be challenging And if you do know how to use T-SQL, building T-SQL statements can be tedious, boring, and error-prone The Query Builder can help you build your T-SQL statements
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NOTE: The rest of this section details how to generate SQL Server stored procedures If you are using a different database management product, you can use that product s tools to create your stored procedures or QueryDefs
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Query Builder is accessible from within the Code Editor when you re working with SQL Server stored procedures Query Builder refers to each T-SQL statement in your stored procedure as a query The Query Builder allows you to work with your query in three ways:
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Visually using the Diagram Pane at the top of the window Tabularly by entering values in a grid using the Criteria Pane Syntactically by building the SQL statements in the SQL Pane
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Any change you make to one pane is made to all the panes For example, if you modify the Diagram Pane, the modi cation appears in the Criteria and SQL Panes This allows you to see the T-SQL statement as it is being built An example query is shown in Figure 812
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Figure 812 The Query Builder dialog provides features for building the T-SQL statements for your stored procedures Starting at the top, the window is divided into Diagram, Criteria, SQL, and Results panes
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Building Stored Procedures
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You can turn any of the panes on or off by right-clicking in the Query Builder, selecting Pane, and then checking/unchecking the pane in the context menu To create a T-SQL statement using the Query Builder: 1 Double-click on the stored procedure in Server Explorer to open it in the Code Editor 2 Right-click in the Code Editor after the AS clause in the stored procedure, and select Insert SQL from the context menu The Query Builder rst displays the Add Table dialog, shown in Figure 813 This dialog allows you to select the database objects to use in your query
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Use the Add Table dialog to select the tables for your query
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3 Select one or more tables and click Add When you are nished, click Close The Query Builder dialog is displayed (see Figure 812) 4 Select the columns to output from your stored procedure by checking the column names in the Diagram Pane, or by checking the Output checkbox for the column in the Criteria Pane, or by typing the list of column names in the SELECT statement in the SQL Pane 5 De ne the parameters to pass into the stored procedure by entering the parameter names in the Filter for the column in the Criteria Pane, or by typing the parameters in the WHERE clause in the SQL Pane In T-SQL, parameter names are pre xed with the @ character
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NOTE: When you reference a stored procedure s parameter, be sure to prefix it with the @ character, as shown in the Filter clause in Figure 812
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6 When you nish building your query, click Execute Query in the Query Builder to test it If your query has parameters, the Query Parameters dialog is displayed for entry of test parameters The result of the query execution appears in the Results Pane at the bottom of the Query Builder, as shown in Figure 812 7 When the query is complete and tested, click OK The Query Builder writes the resulting query into your stored procedure The query is inserted in the Code Editor as follows:
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CREATE PROCEDURE dboProductRetrieveByID_sp ( @ProductID int ) AS SELECT ProductID, ProductName, ProductNumber, Description, Price, ProductType, StockType FROM Product WHERE (ProductID = @ProjectID) RETURN
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To make it easier to work with the columns in your table and for later maintenance, put each column on its own line in the stored procedure, as follows:
ALTER PROCEDURE dboProductRetrieveByID_sp ( @ProductID int ) AS SELECT ProductID, ProductName, ProductNumber, Description, Price,