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DELETE test1 A WHERE EXISTS(SELECT 1 FROM test2 WHERE khdm=A.khdm AND spdm=A.spdm AND A.dj<dj)
--这样试试
delete test1 a
where not exists(select 1 from test2 b
where a.khdm=b.khdm and a.spdm=b.spdm and a.dj>=b.dj)
DELETE test1 A
WHERE EXISTS(SELECT 1 FROM test2 WHERE khdm=A.khdm AND spdm=A.spdm AND A.dj<dj)