Sql 删除同一表中具有匹配多列的行
使用SQL,我有5列:ssn、lastname、firstname、RF和一个标志字段。我需要浏览这个表,其中4列等于另一行,而该行中标志字段的值等于2050,然后删除该2050记录。谢谢各位,一旦您在打印中看到它,它看起来相当简单。。非常感谢你的帮助。。。Sql 删除同一表中具有匹配多列的行,sql,Sql,使用SQL,我有5列:ssn、lastname、firstname、RF和一个标志字段。我需要浏览这个表,其中4列等于另一行,而该行中标志字段的值等于2050,然后删除该2050记录。谢谢各位,一旦您在打印中看到它,它看起来相当简单。。非常感谢你的帮助。。。 delete from MyTable m where flag = 2050 and exists ( select 1 from MyTable where MyTable.ssn = m.ssn an
delete from MyTable m
where flag = 2050
and exists (
select 1 from MyTable where
MyTable.ssn = m.ssn
and MyTable.lastname=m.lastname
and MyTable.firstname=m.firstname
and MyTable.RF=m.RF
and MyTable.flag <> 2050
)
delete from TableName as tn
where tn.flag = 2050 and
exists (select * from TableName as tn2 where tn.ssn = tn2.ssn
and tn.lastname = tn2.lastname and tn.firstname = tn2.firstname
and tn.rf = tn2.rf and tn2.flag <> 2050)
DELETE
T1
FROM
My_Table T1
INNER JOIN My_Table T2 ON
T2.ssn = T1.ssn AND
T2.last_name = T1.last_name AND
T2.first_name = T1.first_name AND
T2.RF_name = T1.RF_name AND
T2.flag <> T1.flag
WHERE
T1.flag = 2050
delete from Table1
where flag = 2050
and exists (select *
from Table2
where ssn = Table1.ssn
and lastname = Table1.lastname
and firstname = Table1.firstname
and rf = Table1.rf
and flag <> 2050)