mysql - 从选择 mysql 中选择

Question

我不知道我做错了什么：

SELECT
  Cont, COUNT(id) 
FROM (
  SELECT *
  FROM protable
  WHERE MATCH (ProdTitulo) AGAINST ('art' IN BOOLEAN MODE)
) 
GROUP BY Cont;

问题是当我尝试使用获取数组时，我得到：“警告：mysql_fetch_array() 期望参数 1 是资源，给定布尔值”

括号内的选择（第 3 行）似乎工作正常。

Answer 1

为子查询设置别名：

SELECT Cont, COUNT(id) 
FROM 
( 
   SELECT * 
   FROM protable 
   WHERE MATCH (ProdTitulo) AGAINST ('art' IN BOOLEAN MODE)
) AS t   -- <---------- You are missing this
GROUP BY Cont