where子句中的MySQL未知列（UNION）

Question

我有以下查询：

select a.clei, a.partNumber, 
(
  SELECT count(*) FROM 
    ( SELECT * from search_upload_data s where a.clei is not null AND a.clei = s.clei 
      UNION
      SELECT * from search_upload_data s where a.partNumber is not null AND a.partNumber = s.partNumber 
    ) as t1
) as total
from api_analytics_data a

抛出错误：

Error Code: 1054. Unknown column 'a.clei' in 'where clause'

我猜MySQL不允许在内部SQL中使用连接引用，但我不确定如何解决这个问题。

我需要来自search_upload_data的计数，请参阅SQL小提琴：http://sqlfiddle.com/#!9/172ac/2

＆LT; ============================================= ============================＆GT;

附加说明

我需要弄清楚如何使用UNION执行此操作。每个人的答案中的OR条件都是小规模的，但是在实际数据库中存在很多数据。

这是解释（对于Rajat的回答）：

Answer 1

试试这个

select a.clei, a.partNumber, 
 ( SELECT COUNT(1) As Total
       from search_upload_data s
       where ( a.clei is not null  AND a.clei = s.clei )
       OR (a.partNumber is not null AND a.partNumber = s.PartNumber)

    ) as t1 

from api_analytics_data a

Answer 2

无论如何，这与您想要的输出相对应。只需使用常规OR来选择 clei或partnumber 。

select a.clei, a.partNumber, 
(
  SELECT count(*) FROM search_upload_data s WHERE 
     (a.clei is not null AND a.clei = s.clei) OR 
     (a.partNumber is not null AND a.partNumber = s.partNumber) 
) as Total
from api_analytics_data a

Answer 3

尝试：简单加入OR和GROUP BY

SELECT a.clei, 
    a.partNumber, 
    COUNT(1) tot
FROM api_analytics_data a
LEFT JOIN search_upload_data s ON (a.clei = s.clei OR a.partNumber = s.partNumber)
    AND (a.clei is not null OR a.partNumber is not null)
GROUP BY a.clei, a.partNumber

输出： http://sqlfiddle.com/#!9/94e556/1

Answer 4

select a.clei, a.partNumber, 
(
  SELECT count(s.id) FROM search_upload_data s where (a.clei is not null AND a.clei = s.clei) OR (a.partNumber is not null AND a.partNumber = s.partNumber) 
) as Total
from api_analytics_data a

立即尝试