SELECT FULLNAME,PDT,BLCMT,CBCT from WK_SHEET_WAIT a WHERE a.SHID = %SHID% and
(exists(select * from WK_SHEET_PROC b where b.SHID=a.SHID) or exists(select * from WK_SHEET_WAIT c where c.SHID=a.SHID))
UNION
select FULLNAME,PDT,BLCMT,CBCT from WK_SHEET_PROC where SHID = %SHID%
两张表合并查询获得联合数据
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转载自blog.csdn.net/megamind_hl/article/details/80876169
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