如何在GROUP BY CASE之後集成HAVING子句

Question

我有以下查詢正常工作，但需要篩選其狀態設置爲「無效」或「已存檔」的記錄中的年齡。我的表名爲Contact，並具有狀態列和年齡列。其他狀態爲「活動」，「後續」和「已完成」。

SELECT CASE 
    WHEN age BETWEEN '0' AND '18' THEN '18 and Under' 
    WHEN age BETWEEN '19' AND '30' THEN '19 to 30' 
    WHEN age BETWEEN '31' AND '40' THEN '31 to 40' 
    WHEN age BETWEEN '41' AND '50' THEN '41 to 50' 
    WHEN age BETWEEN '51' AND '60' THEN '51 to 60'        
    ELSE '61 and Older' 
    END 
,Count(id) 
FROM Contact 
GROUP BY 
CASE 
    WHEN age BETWEEN '0' AND '18' THEN '18 and Under' 
    WHEN age BETWEEN '19' AND '30' THEN '19 to 30' 
    WHEN age BETWEEN '31' AND '40' THEN '31 to 40' 
    WHEN age BETWEEN '41' AND '50' THEN '41 to 50' 
    WHEN age BETWEEN '51' AND '60' THEN '51 to 60'        
    ELSE '61 and Older' 
END 

我想HAVING子句整合如下，但不知道在哪裏把它：

HAVING status NOT IN('Invalid', 'Archived') 

無論我嘗試給出了一個錯誤。任何幫助指出正確的方向將不勝感激。

Answer 1

試試這個sqlFiddle example

SELECT CASE 
     WHEN age BETWEEN '0' AND '18' THEN '18 and Under' 
     WHEN age BETWEEN '19' AND '30' THEN '19 to 30' 
     WHEN age BETWEEN '31' AND '40' THEN '31 to 40' 
     WHEN age BETWEEN '41' AND '50' THEN '41 to 50' 
     WHEN age BETWEEN '51' AND '60' THEN '51 to 60'        
     ELSE '61 and Older' 
     END as age_range, 
     status, 
     Count(id) as `count` 
FROM Contact 
WHERE status NOT IN ('Invalid','Archived') 
GROUP BY age_range,status; 

，或者如果你想使用的HAVING status NOT IN ('Invalid','Archived')，你可以用下面這是相同的最終結果前。 （sqlfiddle example）

SELECT CASE 
     WHEN age BETWEEN '0' AND '18' THEN '18 and Under' 
     WHEN age BETWEEN '19' AND '30' THEN '19 to 30' 
     WHEN age BETWEEN '31' AND '40' THEN '31 to 40' 
     WHEN age BETWEEN '41' AND '50' THEN '41 to 50' 
     WHEN age BETWEEN '51' AND '60' THEN '51 to 60'        
     ELSE '61 and Older' 
     END as age_range, 
     status, 
     Count(id) as `count` 
FROM Contact 
GROUP BY age_range,status 
HAVING status NOT IN ('Invalid','Archived');