Mysql 我可以在我的查询中使用像这样的Where子句吗。。帮助我

不但是

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是有效的

。包括一些示例数据和预期结果。或者考虑应用程序代码中的数据显示问题。

SELECT DATE(dateissued) AS date
     , SUM(amount) AS total_collection1 
 Where accountcodeid = '44'
     , SUM(amount) AS total_collection2   
 Where accountcodeid = '40'
  FROM payment
 GROUP 
    BY dateissued 
 ORDER 
    BY dateissued DESC 
 LIMIT 10

SUM(case when accountcodeid = '44' then amount else 0 end) AS total_collection1