高级建表方式
?
?create table t2 as
?? ?with t as (select level-1 l from dual connect by level<=10),
?? ? ? ? t1 as(select t.l a,t1.l b,t2.l c,t3.l d from t,t t1,t t2,t t3,t t4,t t5,t t6)
?? ?-- select count(*),sum(a+b+c+d) from t1
?? ?SELECT A,B,C,D,
?? ?SUM(CASE
?? ? ? ? ? ? WHEN A>0 THEN 0
?? ? ? ? ? ? ?WHEN B>0 THEN 1
?? ? ? ? ? ? ?WHEN C=0 THEN 2
?? ? ? ? ? ?WHEN D=9 THEN 4
?? ? ? ? ? ?END) Q
??FROM T1
?GROUP BY A,B,C,D
??;
?
select mod(level,2) id from dual connect by level<10
