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我的工作系统,在这里我要更新一个字段dupstat基于4列即CNAME,FNAME,MNAME,DOB重复的记录。此外,我必须检查是否资格列包含值“否”。我有以下查询,找出重复的记录:SQL - 使用内更新记录加入
select o.cname, o.fname, o.CRollNo, o.Coll_Code, o.mname, o.dob, oc.dupeCount, o.Eligible, o.dupstat
from REGN_Temp o
inner join (
SELECT cname, COUNT(*) AS dupeCount, FName, mname, dob
FROM REGN_Temp
GROUP BY cname, FName, mname,dob
HAVING COUNT(*) > 1
) oc on o.cname = oc.cname and o.fname = oc.FName and o.mname = oc.mname and o.dob=oc.dob and o.Eligible='No' order by cname, fname
现在我想更新列“dupstat = Y”所有这些都是重复的记录,并资格 =“NO”