Question

我有这个查询

Select cat.Title,cat.CategoryId,count(*) as Count 
from Companies,
     (Select MallCategories.CategoryId, MallCategories.Title 
      from MallCategories  
      JOIN Malls ON MallCategories.MallId = Malls.MallId 
      WHERE Malls.MallId='5410708140ab88a90f7b23c7') AS cat 
WHERE Companies.MallCategory=cat.CategoryId
GROUP BY cat.CategoryId

此查询在sqlite数据库上正常工作，但是当我在mysql上使用它时，它会返回此错误

Static analysis:

2 errors were found during analysis.

An expression was expected. (near "(" at position 67)
Unexpected token. (near "(" at position 67)
SQL query: Documentation

Select cat.Title,cat.CategoryId,count(*) as Count from Companies, ( LIMIT 0, 25

MySQL said: Documentation

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'LIMIT 0, 25' at line 2

我做错了什么？能帮帮我吗？谢谢

Ps：这就是我所做的，它现在有效，我把它改成了这种形式

Select cat.Title,cat.CategoryId,count(*) as Count 
  from 
  (Select MallCategories.CategoryId, MallCategories.Title 
  from MallCategories JOIN Malls ON MallCategories.MallId = Malls.MallId       
  WHERE  Malls.MallId='5410708140ab88a90f7b23c7') AS cat, 
  Companies 
WHERE Companies.MallCategory=cat.CategoryId 
GROUP BY cat.CategoryId

它有效，我不知道这里发生了什么

MySQL：FROM子句中的子查询

0 个答案: