Принимая Макс из колонки на основе определенных критериев

Question

Нужна ваша помощь, чтобы получить максимум от CAP_PRICE на основе определенных критериев в выберите заявлении SQL:

IF sid_rnk =0 and prd_id_rnk =1 and cap_price <> 0 
    then Max(cap_price) group by (sid_rnk,prd_rnk) as CAP1 

Else if sid_rnk =0 and prd_id_rnk =2 and cap_price <> 0 and cap1 = 0 
    then Max(cap_price) group by (sid_rnk,prd_rnk) as cap2 

Else if sid_rnk =0 and prd_id_rnk =3 and cap_price <> 0 and cap2 = 0 
    then Max(cap_price) group by (sid_rnk,prd_rnk) as cap3 

Else if sid_rnk =1 and prd_id_rnk =1 and cap_price <> 0 and cap3 = 0 
    then Max(cap_price) group by (sid_rnk,prd_rnk) as cap4 

Else if sid_rnk =1 and prd_id_rnk =2 and cap_price <> 0 and cap4 = 0 
    then Max(cap_price) group by (sid_rnk,prd_rnk) as cap5 

Else if sid_rnk =1 and prd_id_rnk =3 and cap_price <> 0 and cap5 = 0 
    then Max(cap_price) group by (sid_rnk,prd_rnk) 

Образец данных:

CREATE TABLE sap_prod 
(
prd_id_rnk int, 
sld_to_rnk int, 
CAP_geo_1 varchar(20), 
F_I_geo_2 varchar(20), 
CAP_price int 
) 


INSERT INTO sap_prod  
     (prd_id_rnk, sld_to_rnk, CAP_geo_1, F_I_geo_2, CAP_price) 
SELECT  1,0,'ASMO','ASMO',0 UNION ALL 
SELECT  1,0,'ASMO','ASMO',0 UNION ALL 
SELECT  1,0,'ASMO','ASMO',0 UNION ALL 
SELECT  2,0,'WW' ,'ASMO',0 UNION ALL 
SELECT  2,0,'WW' ,'ASMO',0 UNION ALL 
SELECT  2,0,'WW' ,'ASMO',0 UNION ALL 
SELECT  3,0,'EMEA','ASMO',0 UNION ALL 
SELECT  3,0,'EMEA','ASMO',0 UNION ALL 
SELECT  3,0,'IJKK','ASMO',0 UNION ALL 
SELECT  3,0,'IJKK','ASMO',0 UNION ALL 
SELECT  1,1,'ASMO','ASMO',0 UNION ALL 
SELECT  1,1,'ASMO','ASMO',0 UNION ALL 
SELECT  1,1,'ASMO','ASMO',0 UNION ALL 
SELECT  2,1,'WW' ,'ASMO',0 UNION ALL 
SELECT  2,1,'WW' ,'ASMO',0 UNION ALL 
SELECT  2,1,'WW' ,'ASMO',0 UNION ALL 
SELECT  3,1,'EMEA','ASMO',35 UNION ALL 
SELECT  3,1,'EMEA','ASMO',40 UNION ALL 
SELECT  3,1,'IJKK','ASMO',70 UNION ALL 
SELECT  3,1,'IJKK','ASMO',50 

результат должен быть: 70

Answer 1

Не уверен, но я думаю, что вам это нужно:

SELECT TOP 1 cap_price 
FROM 
(
    SELECT sld_to_rnk, prd_id_rnk, Max(cap_price) AS cap_price 
    FROM sap_prod 
    WHERE cap_price <> 0 
    group by sld_to_rnk, prd_id_rnk 
) AS tmp 
ORDER BY sld_to_rnk, prd_id_rnk