mysql - PHP MySQL，联合表

Question

有这样的查询:

SELECT * FROM job WHERE status!=2 AND status!=3
UNION SELECT * FROM emp WHERE status!=2 AND status!=3
ORDER BY (id/popularity) DESC LIMIT {$from},$vpc

它工作得很好，但现在无法确定记录来自哪里......有什么方法可以识别记录来自哪个表？

Answer 1

我猜你可以试试这个:

      SELECT *, 'job' as origin 
        FROM job 
       WHERE status!=2 
         AND status!=3
UNION SELECT *, 'emp' as origin
        FROM emp 
       WHERE status!=2 
         AND status!=3
    ORDER BY (id/popularity) DESC 
       LIMIT {$from},$vpc

这应该会在您的结果中添加一个名为 origin 的字段，其中包含您选择的用于标识表格的名称。