给定以下示例查询（仅简化示例）
DECLARE @DT int; SET @DT=20110717; -- yes this is an INT
WITH LargeData AS (
SELECT * -- This is a MASSIVE table indexed on dt field
FROM mydata
WHERE dt=@DT
), Ordered AS (
SELECT TOP 10 *
, ROW_NUMBER() OVER (ORDER BY valuefield DESC) AS Rank_Number
FROM LargeData
)
SELECT * FROM Ordered
还有...
DECLARE @DT int; SET @DT=20110717;
BEGIN TRY DROP TABLE #LargeData END TRY BEGIN CATCH END CATCH; -- dump any possible table.
SELECT * …