如何在 if exists 条件下执行子查询? [英] How to execute sub query in if exists condition?

问题描述

declare @qry varchar(100)
declare @cnt int
set @qry = ' where '

if exists( select * from  ARTICLE_MANAGE +@qry+ article_id=65)
BEGIN
select top 1* from  ARTICLE_MANAGE order by article_id desc
END
ELSE
BEGIN
select * from  ARTICLE_MANAGE order by article_id desc
END

这是查询.'@qry' 被我们传递给查询的内容改变了

This is the query. '@qry' is changed by what we passed to the query

推荐答案

DECLARE @qry VARCHAR(100);
DECLARE @cnt INT;
set @qry = ' where '
DECLARE @ExeQuery VARCHAR(MAX);
SET @ExeQuery='if exists( select * from  ARTICLE_MANAGE '+@qry+' article_id=65)
BEGIN
select top 1* from  ARTICLE_MANAGE order by article_id desc
END
ELSE
BEGIN
select * from  ARTICLE_MANAGE order by article_id desc
END'
 EXEC(@ExeQuery)

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