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