mysql - 字段列表中的未知列 - 除法

Question

此查询将返回错误（字段列表中的未知列 numero_propostas）。我想要的是这样的：

SELECT COUNT(*) as numero_propostas, 
       total as total, 
       (numero_propostas / total) as divisao 
FROM ConsultaArtigos2 AS ca
...

正确的方法是什么？

Answer 1

SELECT COUNT(*) as numero_propostas, 
       total as total, 
       (COUNT(*)/ total) as divisao 
FROM ConsultaArtigos2 AS ca...

Answer 2

在 MySQL 查询语句中，您必须在引用位置使用列名

  SELECT COUNT(*) as numero_propostas, 
         total as total, 
         (COUNT(*) / total) as divisao 
   FROM ConsultaArtigos2 AS ca