SQL 两表关联更新UPDATE (用一个表更新另一个表)
方法1:
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update table1 set field1=table2.field1 from table2 where table1.id=table2.id |
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--简写 update t1 set t1.c2 = t2.c2 from t2 where t1.c1 = t2.c1 |
方法2:
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update table1 set field1=( select top 1 field1 from table2 where table2.id=table1.id) where table1.id in (condition) |