if not exists(select 1 from sysobjects where type='U' and na
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if not exists(select 1 from sysobjects where type='U' and name='staffinfo')
有什么作用?
有什么作用?
判断是否存在名为staffinfo的用户表,若不存在执行if语句块中的语句
if not exists(select 1 from sysobjects where type='U' and na
if not exists (SELECT * From TA_ARTIFICER Where ARTID = @Art
if exists (select 1 from #tmp_dj_xsg212 WHERE shangplx LIKE
// IF EXISTS (SELECT name FROM m
select * from book where 1=1
insert into REC_OVER(ORG_ID) select '1' from dual where not
数据库 相关子查询 SELECT SNFROM SWHERE (NOT EXISTS( SELECT *FROM CWH
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英语翻译select top 4 * from shop_books where anclassid = (select
if (pastart = -1) sql.append("select * from("); sql.append("