Question

我有这个问题：

$query = "SELECT pic_square,
                 name,
                 highest_score,
                 num_tries,
                 avg_total 
            FROM users 
       WHERE NOT played_game = '0' 
        ORDER BY avg_total DESC";

我为所有用户选择pic_square，name，highest_score，num_tries和avg_total FROM

不要将他们玩过的游戏设置为＆＃39; 0＆＃39;＆＃39;

我想添加其他条件，因此我只选择以下用户：

请勿将他们的plays_game设置为＆＃39; 0＆＃39;＆＃39;
请勿将其名称清空

PS： 名称不能为空，它只能为空，我无法更改数据库结构本身。

那么如何将这些双重WHERE一起添加？

Answer 1

WHERE NOT (played_game = '0' or name = '')

或

WHERE played_game <> '0' and name <> ''

Answer 2

$query = "SELECT pic_square,name,highest_score,num_tries,avg_total FROM users 
  WHERE NOT (played_game = '0' OR name IS NULL OR name='' ) 
  ORDER BY avg_total DESC";

Answer 3

$query = "SELECT pic_square,name,highest_score,num_tries,avg_total FROM users 
  WHERE played_game <> '0' AND name <> ''  ORDER BY avg_total DESC";

只需改变条件，如

where played_game <> '0' AND name <> ''

Answer 4

您可以使用此查询：

$query = "SELECT pic_square,
                 name,
                 highest_score,
                 num_tries,
                 avg_total 
            FROM users 
           WHERE NOT played_game = '0' 
             AND IFNULL(name,'') <> ''
        ORDER BY avg_total DESC";

使用IFNULL，您可以确保NULL值和空值的处理方式相同。

Answer 5

$query = "SELECT pic_square,name,highest_score,num_tries,avg_total 
          FROM users 
          WHERE played_game != '0' 
            AND name NOT NULL 
          ORDER BY avg_total DESC";

Double WHERE NOT语句sql

5 个答案: