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CREATE TRIGGER trg_T1_i ON T1 FOR INSERT AS DECLARE @rc AS INT = (SELECT COUNT(*) FROM (SELECT TOP (2) * FROM inserted) AS D); IF @rc = 0 RETURN; DECLARE @keycol AS INT, @datacol AS VARCHAR(10); IF @rc = 1 -- single row BEGIN SELECT @keycol = keycol, @datacol = datacol FROM inserted; PRINT 'Handling keycol: ' + CAST(@keycol AS VARCHAR(10)) + ', datacol: ' + @datacol; END ELSE -- multi row BEGIN DECLARE @C AS CURSOR; SET @C = CURSOR FAST_FORWARD FOR SELECT keycol, datacol FROM inserted; OPEN @C; FETCH NEXT FROM @C INTO @keycol, @datacol; WHILE @@FETCH_STATUS = 0 BEGIN PRINT 'Handling keycol: ' + CAST(@keycol AS VARCHAR(10)) + ', datacol: ' + @datacol; FETCH NEXT FROM @C INTO @keycol, @datacol; END END GO

This trigger simply prints the values provided in each new row inserted by the triggering INSERT action . It demonstrates how to deal with each row individually . The trigger then counts the number of rows returned by a TOP (2) query against inserted, and stores the result in a variable called @rc . Possible result values are 0, 1, and 2, indicating that zero, one, or more rows, respectively, were affected by the action that caused the trigger to fire . Note Prior to SQL Server 2008 I simply evaluted the @@rowcount function within the trigger

<td><xsl:value-of select="@name"/></td> <td>$$ <xsl:value-of select="./price[@currency=USD]"/> </td> <td> <a href="http://www.exampleco.com/buyStock symbol= <xsl:value-of select="@symbol"/>"> buy </a>     <a href="http://www.exampleco.com/sellStock symbol= <xsl:value-of select="@symbol"/>"> sell </a> </td> </tr> </xsl:for-each> </table> </body> </html> </xsl:template> </xsl:stylesheet>

To display the current date in a ToolTip, using the Tablet pen, hover the pointer over the time in the notification area.

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in order to tell how many rows were affected by the statement that caused the trigger to fire . However, in SQL Server 2008, when you evaluate @@rowcount in an INSERT, UPDATE, or DELETE trigger that was fired due to a MERGE statement, you will get the total number of rows affected by MERGE . This number includes all actions not just the specific one that caused the trigger to fire . Since you cannot rule out running the MERGE statement in your system, you can t rely on @@rowcount within a trigger in SQL Server 2008 . Instead, you should query inserted or deleted as I demonstrated .

If zero rows were affected, the trigger returns . If one row was affected, the code uses an assignment SELECT to grab the values from the row inserted into local variables . If multiple rows were affected, the code uses a cursor to iterate through the multiple rows in inserted . In each iteration, the code prints the values from the current row and fetches the values from the next row . To test the trigger, first run the following code, which inserts zero rows:

INSERT INTO dbo.T1 SELECT 1, 'A' WHERE 1 = 0;

For brevity s sake, we forego listing the other three stylesheets. You can download them to examine from the book s web site (http://www.manning.com/ gabrick) if you so choose.

As expected, you get no output from the trigger . Next, insert a single row:

INSERT INTO dbo.T1 SELECT 1, 'A';

You get the following output:

The XSLT architecture we have created is both modular and extremely flexible. It allows us to create a single, integrated presentation layer that serves appropriate content to various client types and locales. To support new locales and client types, we need only add more stylesheets to the framework and select them when appropriate. By making the stylesheet selection configurable, we could reduce the extension process to creating a single text file (the stylesheet) and updating our web application configuration file so the filter can use it. Another major advantages of this architecture is the ability to separate development roles more effectively. The presentation page author can implement the

Finally, insert multiple rows:

INSERT INTO dbo.T1 VALUES (2, 'B'), (3, 'C'), (4, 'D');

You get the following output:

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