Question

我正在通过构建动态字符串来编写存储过程：

以下查询是存储在变量中的字符串。我该如何执行这个字符串？

 DELETE FROM PopularTrends          
 WHERE PopularID NOT IN           
 (          
 SELECT  PopularID          
 FROM   (SELECT *,          
           Row_number()          
             OVER(          
               PARTITION BY COUNTRY,HRefTopic          
               ORDER BY LastModifiedTime desc) AS RN          
    FROM   populartrends )A          
    WHERE  RN = 1          
 )

Answer 1

像这样：

DECLARE @query NVARCHAR(1000)
SET @query=N'DELETE FROM PopularTrends          
 WHERE PopularID NOT IN           
 (          
 SELECT  PopularID          
 FROM   (SELECT *,          
           Row_number()          
             OVER(          
               PARTITION BY COUNTRY,HRefTopic          
               ORDER BY LastModifiedTime desc) AS RN          
    FROM   populartrends )A          
    WHERE  RN = 1          
 )'
EXEC sp_executesql @query

参考：

sp_executesql (Transact-SQL)

动态字符串 - 作为sql-query执行

1 个答案: