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从MySQL的SHOW COLUMNS中排除某些列？

2024-04-24 05:59:05 310

让我们首先创建一个演示表

mysql> create table excludeCertainColumnsDemo
   -> (
   -> StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   -> StudentName varchar(100),
   -> StudentAge int,
   -> StudentMarks int,
   -> StudentAddress varchar(200)
   -> );

现在，您可以在desc命令的帮助下检查表的描述。查询如下-

mysql> desc excludeCertainColumnsDemo;

以下是输出

+----------------+--------------+------+-----+---------+----------------+
| Field          | Type         | Null | Key | Default | Extra          |
+----------------+--------------+------+-----+---------+----------------+
| StudentId      | int(11)      | NO   | PRI | NULL    | auto_increment |
| StudentName    | varchar(100) | YES  |     | NULL    |                |
| StudentAge     | int(11)      | YES  |     | NULL    |                |
| StudentMarks   | int(11)      | YES  |     | NULL    |                |
| StudentAddress | varchar(200) | YES  |     | NULL    |                |
+----------------+--------------+------+-----+---------+----------------+
5 rows in set (0.01 sec)

这是从SHOWCOLUMNS中排除某些列的查询。您需要排除“StudentAge”和“StudentMarks”列。查询如下-

mysql> SHOW COLUMNS FROM excludeCertainColumnsDemo WHERE Field NOT IN ('StudentAge', 'StudentMarks');

以下是输出

+----------------+--------------+------+-----+---------+----------------+
| Field          | Type         | Null | Key | Default | Extra          |
+----------------+--------------+------+-----+---------+----------------+
| StudentId      | int(11)      | NO   | PRI | NULL    | auto_increment |
| StudentName    | varchar(100) | YES  |     | NULL    |                |
| StudentAddress | varchar(200) | YES  |     | NULL    |                |
+----------------+--------------+------+-----+---------+----------------+
3 rows in set (0.00 sec)

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从MySQL的SHOW COLUMNS中排除某些列？

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