语法: update table1 set table1.列=table2.列 from table2 where table2.列=table1.列update NFYSP.dbo.PATIENT setPATIENT_ADDUSERID=OLD.PATIENT_ADDUSERID,PATIENT_UPDATEUSERID=OLD.PATIENT_UPDATEUSERID,PATIENT_UPDATEUSERNAME=OLD.PATIENT_UPDATEUSERNAME,PATIENT
3.查找表中多余的重复记录(多个字段) select * from vitae awhere (a.peopleId,a.seq) in (select peopleId,seq from vitae group by peopleId,seq having count(*) > 1) 注意这里 in可以有多个字段