SQL从IN（）中的每个项目获取结果

Question

嗨，有人能帮助我吗？

我有此查询：

SELECT DISTINCT(CAMPAIGN), 
    count(STATUS) 
FROM  
C18_101 INNER JOIN CLIENT_10 ON C18_101.ID = CLIENT_10.ID 
WHERE CAMPAIGN in ('Batch 1','Batch 2','Batch 3','Batch 4','Batch 5') AND STATUS = 'Pending' 
GROUP BY CAMPAIGN,STATUS 

结果看起来是这样的：

Batch 2  241 

Batch 3  321 

Batch 4  575 

Batch 5  429 

我还需要BATCH1结果，即使是没有的。

Answer 1

SELECT 
    X.CAMPAIGN, 
    count(STATUS) 
FROM 
    (SELECT DISTINCT CAMPAIGN FROM C18_101) X 
    LEFT JOIN 
    CLIENT_10 C ON X.ID = C.ID AND C.STATUS = 'Pending' 
GROUP BY 
    X.CAMPAIGN 

1. 你要么GROUP BY或聚合，而不是两个
2. 您不同的前JOIN，以确保您的计数是每个广告活动的正确
3. 你真的需要一个活动过滤器？如果是这样，请添加到派生表X

Answer 2

SELECT CAMPAIGN, 
    count(STATUS) 
FROM C18_101 
LEFT JOIN CLIENT_10 ON C18_101.ID = CLIENT_10.ID AND STATUS = 'Pending' 
WHERE CAMPAIGN in ('Batch 1','Batch 2','Batch 3','Batch 4','Batch 5') 
GROUP BY CAMPAIGN