MySQL查詢，爲值時出現不止一次對同一個客戶端

Question

我有一個MySQL表與下面的模式：

表 - charges

+=============+==============+ 
| chargeName | clientId | 
+=============+==============+ 
| late fee | 123456 | 
+-------------+--------------+ 
| late fee | 123456 | 
+-------------+--------------+ 
| payment | 123456 | 
+-------------+--------------+ 
| refund | 782151 | 
+-------------+--------------+ 
| late fee | 782151 | 
+-------------+--------------+ 

我需要返回的實例，其中chargeName「滯納金「出現在同一clientId不止一次。

例如，鑑於上述情況，我期望我的查詢返回「123456」，因爲該clientId有2個與其關聯的「滯納金」。

我試圖從SQL Query To Obtain Value that Occurs more than once

SELECT clientId 
FROM 
    (SELECT chargeName, count(*) as Counter, clientId 
    FROM charges 
    GROUP BY `chargeName`) 
AS tbl 
WHERE Counter > 1 
AND chargeName='late fee' 
limit 1000; 

但是適應this answer，此查詢只返回一行（從我更大的數據集），並返回ClientID的只有它這麼清楚它是有關1個滯納金不工作。

如何才能返回chargeName「滯納金」出現在同一clientId多次的情況。

Answer 1

你可以通過GROUP BY和HAVING來完成。

SELECT clientID, chargeName 
FROM charges 
WHERE chargeName LIKE 'late fee' 
GROUP BY clientID HAVING count(clientID) > 1