在Oracle数据库中,删除重复数据,大都会使用如下方法:
delete from tbl a where rowid<>(select max(b.rowid) from tbl b where a.col1=b.col1 and a.col2 = b.col2);
在Oracle数据库中,删除重复数据,大都会使用如下方法:
delete from tbl a where rowid<>(select max(b.rowid) from tbl b where a.col1=b.col1 and a.col2 = b.col2);