学习Oracle日记（八）--ORACLE CASE WHEN

Ⅰ. ORACLE  WHERE 字句里面使用CASE WHEN 25行

Ⅱ.  嵌套使用 CASE WHEN  2~13行

 1 SELECT 

 2        SUM(CASE WHEN M.MV_AVG < 800 AND C.THICKNESS >= 0.5  AND C.THICKNESS <= 0.9  THEN  (CASE WHEN D.MV_AVG = 0 OR D.MV_AVG IS NULL THEN 0 ELSE P.LENGTH / D.MV_AVG END ) END ) R1CD ,--1区间内长度/炉区速度

 3        SUM(CASE WHEN M.MV_AVG < 800 AND C.THICKNESS > 0.9  AND C.THICKNESS <= 1.3  THEN  (CASE WHEN D.MV_AVG = 0 OR D.MV_AVG IS NULL THEN 0 ELSE P.LENGTH / D.MV_AVG END) END ) R2CD ,--2区间内长度/炉区速度

 4        SUM(CASE WHEN M.MV_AVG < 800 AND C.THICKNESS > 1.3  AND C.THICKNESS <= 1.6  THEN  (CASE WHEN D.MV_AVG = 0 OR D.MV_AVG IS NULL THEN 0 ELSE P.LENGTH / D.MV_AVG END) END ) R3CD ,--3区间内长度/炉区速度

 5        SUM(CASE WHEN M.MV_AVG < 800 AND C.THICKNESS > 1.6  THEN  (CASE WHEN D.MV_AVG = 0 OR D.MV_AVG IS NULL THEN 0 ELSE P.LENGTH / D.MV_AVG END) END ) R4CD ,   --4区间内长度/炉区速度

 6        SUM(CASE WHEN M.MV_AVG >= 800 AND M.MV_AVG < 830 AND C.THICKNESS >= 0.5  AND C.THICKNESS <= 0.9  THEN   (CASE WHEN D.MV_AVG = 0 OR D.MV_AVG IS NULL THEN 0 ELSE P.LENGTH / D.MV_AVG END) END ) R5CD ,--5区间内长度/炉区速度

 7        SUM(CASE WHEN M.MV_AVG >= 800 AND M.MV_AVG < 830 AND C.THICKNESS > 0.9  AND C.THICKNESS <= 1.3  THEN  (CASE WHEN D.MV_AVG = 0 OR D.MV_AVG IS NULL THEN 0 ELSE P.LENGTH / D.MV_AVG END) END ) R6CD ,--6区间内长度/炉区速度

 8        SUM(CASE WHEN M.MV_AVG >= 800 AND M.MV_AVG < 830 AND C.THICKNESS > 1.3  AND C.THICKNESS <= 1.6  THEN  (CASE WHEN D.MV_AVG = 0 OR D.MV_AVG IS NULL THEN 0 ELSE P.LENGTH / D.MV_AVG END) END ) R7CD ,--7区间内长度/炉区速度

 9        SUM(CASE WHEN M.MV_AVG >= 800 AND M.MV_AVG < 830 AND C.THICKNESS > 1.6  THEN (CASE WHEN D.MV_AVG = 0 OR D.MV_AVG IS NULL THEN 0 ELSE P.LENGTH / D.MV_AVG END) END ) R8CD ,   --8区间内长度/炉区速度

10        SUM(CASE WHEN M.MV_AVG >= 830 AND C.THICKNESS >= 0.5  AND C.THICKNESS <= 0.9  THEN  (CASE WHEN D.MV_AVG = 0 OR D.MV_AVG IS NULL THEN 0 ELSE P.LENGTH / D.MV_AVG END) END ) R9CD ,--9区间内长度/炉区速度

11        SUM(CASE WHEN M.MV_AVG >= 830 AND C.THICKNESS > 0.9  AND C.THICKNESS <= 1.3  THEN  (CASE WHEN D.MV_AVG = 0 OR D.MV_AVG IS NULL THEN 0 ELSE P.LENGTH / D.MV_AVG END) END ) R10CD ,--10区间内长度/炉区速度

12        SUM(CASE WHEN M.MV_AVG >= 830 AND C.THICKNESS > 1.3  AND C.THICKNESS <= 1.6  THEN   (CASE WHEN D.MV_AVG = 0 OR D.MV_AVG IS NULL THEN 0 ELSE P.LENGTH / D.MV_AVG END) END ) R11CD ,--11区间内长度/炉区速度

13        SUM(CASE WHEN M.MV_AVG >= 830 AND C.THICKNESS > 1.6  THEN  (CASE WHEN D.MV_AVG = 0 OR D.MV_AVG IS NULL THEN 0 ELSE P.LENGTH / D.MV_AVG END) END ) R12CD    --12区间内长度/炉区速度

14  FROM PRODCOIL_MV M , (SELECT M.PCOIL_SID , M.MV_AVG   FROM PRODCOIL_MV M  WHERE M.QDR_CHAN = 1  AND  M.PRODUCT_LINE = 'CGL1') D ,PRODCOILS P ,COILS  C  ,PRODCOILS_SOURCES S  

15 WHERE M.PCOIL_SID = P.PCOIL_SID 

16   AND P.PCOIL_SID = S.PCOIL_SID

17   AND S.COIL_SID = C.COIL_SID 

18   AND M.PCOIL_SID = D.PCOIL_SID

19   AND P.DUMMY_COIL = 0

20   AND M.PRODUCT_LINE = 'CGL1'

21   AND P.PRODUCT_LINE = 'CGL1'

22   AND C.PRODUCT_LINE = 'CGL1'

23   AND S.PRODUCT_LINE = 'CGL1'

24   

25   AND M.QDR_CHAN = (CASE WHEN 'CGL1' = 'CGL1' THEN 521 ELSE 531 END )

26   AND P.PROD_DAY  BETWEEN TO_DATE('2014-12-01','YYYY-MM-DD') AND TO_DATE('2014-12-31','YYYY-MM-DD')