高级建表方式

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 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