oracle去所有數(shù)據(jù)的空格 oracle批量插入時(shí),如何去除重復(fù)數(shù)據(jù)?
oracle批量插入時(shí),如何去除重復(fù)數(shù)據(jù)?先去重再導(dǎo)入。 刪除表中多余的重復(fù)記錄(多個(gè)字段),只留有rowid最小的記錄 delete from 表 a where (a.Id,a.seq) in
oracle批量插入時(shí),如何去除重復(fù)數(shù)據(jù)?
先去重再導(dǎo)入。 刪除表中多余的重復(fù)記錄(多個(gè)字段),只留有rowid最小的記錄 delete from 表 a where (a.Id,a.seq) in (select Id,seq from 表 group by Id,seq having count(*) > 1)and rowid not in (select min(rowid) from 表 group by Id,seq having count(*)>1)