adosea的专栏

WITH T AS   (SELECT ROWNUM RN FROM DUAL CONNECT BY LEVEL  SELECT RN    FROM T   WHERE RN > 1  MINUS  SELECT A.RN * B.RN    FROM T A, T B   WHERE A.RN 1 AND B.RN > 1;

WITHTAS (SELECTROWNUMRNFROMDUALCONNECTBYLEVEL select*fromtwherernnotin( SELECTdistincta.RN FROMTa,tb WHEREmod(a.rn,b.rn)=0 anda.rn>1andb.rn>1 anda.rn>b.rn

原始数据：select * from date_tab; 目标格式： 解法一： select year,     Sum(case when month =1 then amount end) as m1,     Sum(Case when month=2 then amount end) as m2,     Sum(Case when month=3 then

--建表语句和数据 CREATE TABLE DISTANCE_TT (   ODF1 NUMBER , ODF2 NUMBER , DISTANCE NUMBER ) ; INSERT INTO DISTANCE_TT(ODF1, ODF2, DISTANCE) VALUES (9,10,4); INSERT INTO DISTANCE_TT(ODF1, ODF2, DIS

---not  exists select count(distinct a.pos_mer_id) from tests a where a.stat_flag='C' and not exists (select 1 from hfods.tests b where b.stat_flag='N' and b.pos_mer_id=a.pos_mer_id); 改写成no