Groupe Sql Par deux champs

Question

J'ai deux tables Customers et CustomerStatusEntries:

CustomerStatusEntries 
--------------------------- 
Id | Branch | CustomerStatus_Value | Customer_Id 

CustomerStatus_Value = ("B" = "Block" , "E" = "Created" etc...) 

Je dois obtenir cette sortie

Answer 1

SELECT Branch AS 'Branch Code', 
    SUM(CASE WHEN CustomerStatus_Value = 'E' THEN 1 ELSE 0 END) AS 'Created', 
    SUM(CASE WHEN CustomerStatus_Value = 'A' THEN 1 ELSE 0 END) AS 'Active', 
    SUM(CASE WHEN CustomerStatus_Value = 'B' THEN 1 ELSE 0 END) AS 'Blocked', 
    SUM(CASE WHEN CustomerStatus_Value = 'C' THEN 1 ELSE 0 END) AS 'Cancelled', 
    COUNT(CustomerStatus_Value) AS 'All' 
FROM CustomerStatusEntries 
GROUP BY Id 

Answer 2

En supposant que le nombre fixe de colonnes que vous avez montré dans votre échantillon, vous pourriez faire ceci:

SELECT Branch, 
     SUM(CASE WHEN CustomerStatus_Value = 'E' THEN 1 ELSE 0 END) AS Created, 
     SUM(CASE WHEN CustomerStatus_Value = 'A' THEN 1 ELSE 0 END) AS Active, 
     SUM(CASE WHEN CustomerStatus_Value = 'B' THEN 1 ELSE 0 END) AS Blocked, 
     SUM(CASE WHEN CustomerStatus_Value = 'C' THEN 1 ELSE 0 END) AS Cancelled, 
     COUNT(*) AS All 
    FROM CustomerStatusEntries 
    GROUP BY Branch; 

Answer 3

Vous pouvez le faire avec la norme SQL:

select branch_code, 
     sum(case when CustomerStatus_Value = 'E' then 1 else 0 end) as Created, 
     sum(case when CustomerStatus_Value = 'B' then 1 else 0 end) as Blocked, 
     ... 
from t 
group by branch_code 
order by 1