Question

CDbCommand无法执行SQL语句：SQLSTATE [42S22]：找不到列：1054'order子句'中的未知列'update_time'。

执行的SQL语句是：

SELECT `t`.`id` AS `t0_c0`, 
       `t`.`title` AS `t0_c1`, 
       `t`.`content` AS `t0_c2`, 
       `t`.`status` AS `t0_c3`, 
       `t`.`tags` AS `t0_c4`, 
       `t`.` update_time` AS `t0_c5`, 
       `t`.`create_time` AS `t0_c6`, 
       `t`.`author_id` AS `t0_c7` 
  FROM `post` `t` 
 WHERE (status=2) 
 ORDER BY update_time DESC 
 LIMIT 10

Answer 1

尝试通过它的别名引用该列：

SELECT `t`.`id` AS `t0_c0`, 
   `t`.`title` AS `t0_c1`, 
   `t`.`content` AS `t0_c2`, 
   `t`.`status` AS `t0_c3`, 
   `t`.`tags` AS `t0_c4`, 
   `t`.`update_time` AS `t0_c5`, 
   `t`.`create_time` AS `t0_c6`, 
   `t`.`author_id` AS `t0_c7` 
FROM `post` `t` 
WHERE (`t`.`status`=2) 
ORDER BY `t`.`update_time` DESC 
LIMIT 10

Answer 2

您需要使用列名称指定表名本身，就像

一样

 WHERE (t.status=2)   //replace this line in your code
 ORDER BY t.update_time DESC  //replace this line in your code

显示连接数据库时出错

2 个答案: