select * from (select xm,je from table) a , (select xm01,je01 from table) b
where a.xm = b.xm01
and a.je <> b.je01
<> 或 !=
select * from (select xm,je from table) a , (select xm01,je01 from table) b
where a.xm = b.xm01
and a.je <> b.je01
<> 或 !=
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