开发者

SQL: How do I use parameter for TOP like in SELECT TOP @amount? [duplicate]

This question already has answers here: Use variable with TOP in select statement in SQL Server without making it dynamic [duplicate] (3 answers) Closed 8 years ago.

Using the vs2008 query builder, I’m trying to make a query that gets a parameter for the "TOP" Command, and then I face an error "Error in top ex开发者_如何学Gopression"

Works:

SELECT TOP 5 * FROM dbo.SomeTable
WHERE SomeColumn = SomeValue

Doesn't Work:

SELECT TOP @param1 * FROM dbo.SomeTable
WHERE SomeColumn = SomeValue

alt text http://www.freeimagehosting.net/uploads/f9b9354577.jpg


Need parenthesis, and only for SQL Server 2005 and above

SELECT TOP (@param1) ...


For older versions of SQL Server, you can use:

SET ROWCOUNT @NumberOfResults
SELECT * FROM MyTable
SET ROWCOUNT 0

However, you should not use this technique on 2008:

Using SET ROWCOUNT will not affect DELETE, INSERT, and UPDATE statements in the next release of SQL Server (2008). Do not use SET ROWCOUNT with DELETE, INSERT, and UPDATE statements in new development work, and plan to modify applications that currently use it. Also, for DELETE, INSERT, and UPDATE statements that currently use SET ROWCOUNT, we recommend that you rewrite them to use the TOP syntax. For more information, see DELETE (Transact-SQL), INSERT (Transact-SQL), or UPDATE (Transact-SQL).

0

上一篇:

下一篇:

精彩评论

暂无评论...
验证码 换一张
取 消

最新问答

问答排行榜