oracle按照指定列分组合计group by rollup()

group by rollup() 按分组合计

select grouping(status),status,owner,object_type,count(*) from dba_objects

where owner not in ('SYS','SYSTEM')

group by rollup (status,owner,object_type)

order by status,owner,object_type;

经典分类查询语句：

select object_type,count(*) from

( select decode(object_type,'TABLE','TABLE','INDEX','INDEX','OTHERS') object_type from dba_objects )

group by rollup(object_type);