SELECT a,b,count(*)
FROM t
GROUP BY rollup(a,b)
结果:
a1, b1, 10
a1, b2, 90
a1, , 100
我需要:
a1, b1, 10, 100
a1, b2, 90, 100
怎么样?
最佳答案
该表模拟了您的情况:
SQL> create table t (a,b)
2 as
3 select 'a1', 'b1'
4 from dual
5 connect by level <= 10
6 union all
7 select 'a1', 'b2'
8 from dual
9 connect by level <= 90
10 /
Table created.
您只有三行的结果会漏掉总计,因此有点不准确:rollup(a,b)会导致3行分组的结果包含4行。
SQL> select a
2 , b
3 , count(*)
4 from t
5 group by rollup(a,b)
6 /
A B COUNT(*)
-- -- ----------
a1 b1 10
a1 b2 90
a1 100
100
4 rows selected.
使用常规分组依据和顶部的分析功能,您可以实现所需的结果集:
SQL> select a
2 , b
3 , count(*)
4 , sum(count(*)) over (partition by a)
5 from t
6 group by a
7 , b
8 /
A B COUNT(*) SUM(COUNT(*))OVER(PARTITIONBYA)
-- -- ---------- -------------------------------
a1 b2 90 100
a1 b1 10 100
2 rows selected.
问候,
抢。
关于sql - oracle sql组数,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/3856723/