oracle 批量更新
表ks_pscjjlb：表:ks_pscjjlb_temp
现在根据ks_pscjjlb_temp表来根据ks_pscjjlb表中的cj字段的值
update ks_pscjjlb p1 set p1.cj=(select cj from ks_pscjjlb_temp p2 where p1.id=p2.id )
where exists(select 1 from ks_pscjjlb_temp p2 where p2.id=p1.id)
更新后的结果为:3条
select * from ks_pscjjlb显示结果如下:
如果update语写成如下:
update ks_pscjjlb p1 set p1.cj=(select cj from ks_pscjjlb_temp p2 where p1.id=p2.id )
更新结果为：4条
更新后select * from ks_pscjjlb显示结果如下:
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