update ima_file A set A.ima18= (select ima18 from ima_tmp where A.Ima01 = ima_tmp.ima01)
where exists (select 1 from ima_tmp where A.Ima01 = ima_tmp.ima01)
oracle 表對錶更新
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update ima_file A set A.ima18= (select ima18 from ima_tmp where A.Ima01 = ima_tmp.ima01)
where exists (select 1 from ima_tmp where A.Ima01 = ima_tmp.ima01)