--统计用户占用多大的空间
select sum(bytes)/1024/1024 from user_extents;
select sum(bytes)/1024/1024 from dba_extents;
--一行数据超过4k
select * from (select sum(b.DATA_LENGTH) as sum,b.TABLE_NAME from user_tab_columns b group by b.TABLE_NAME ) where sum>=4000
--统计用户占用多大的空间
select sum(bytes)/1024/1024 from user_extents;
select sum(bytes)/1024/1024 from dba_extents;
--一行数据超过4k
select * from (select sum(b.DATA_LENGTH) as sum,b.TABLE_NAME from user_tab_columns b group by b.TABLE_NAME ) where sum>=4000