SQL_Update
摘要:1、将表B中的数据更新到表A(Cardno要为空) ①update A set A.CardNo = B.CardNo from A,B where B.Id = A.Id and A.CardNo is null ②update A set A.CardNo=(select B.CardNo fr
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posted @ 2018-10-03 15:55
posted @ 2018-10-03 15:55