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delete aaaa a
where a.rowid not in  
(
  select max(b.rowid) from aaaa b
    where a.a = b.a
)


a.a(¥Nªía tableªºÄæ¦ì)


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select OIV_NO,count(*) from a02_oinvo2 group by oiv_no
vean0803i

¦^´_ 1# vean0803i


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