两个相似SQL的查询结果,以前未曾注意



select a.*, case when x.resno is null then 0 else 1 end as isown from prm_res a

left join 

(select b.resno from prm_res b

inner join prmg_role_res c on b.resno=c.resno

inner join prmg_acct_role d on d.roleno=c.roleno and d.acct=1

) as x

on a.resno=x.resno where a.sysno=1;

wKiom1lL6wOQyyVXAACBSqLeMcg654.png-wh_50


select a.*, case when x.resno is null then 0 else 1 end as isown from prm_res a

left join 

(select b.resno from prm_res b

inner join prmg_role_res c on b.resno=c.resno

inner join prmg_acct_role d on d.roleno=c.roleno and d.acct=1

) as x

on a.resno=x.resno and a.sysno=1;

wKiom1lL6xTjdnVLAACIy6VHngw446.png-wh_50


谁知道啥情况?欢迎留言