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如何在MySQL中查找列名？

2024-04-21 09:44:10 442

为此，您可以使用SHOWCOLUMNS或INFORMATION_SCHEMA.COLUMN。

让我们首先创建一个表-

mysql> create table DemoTable603
   (
      ClientId int NOT NULL AUTO_INCREMENT,
      ClientName varchar(100),
      ClientAge int,
      ClientAddress varchar(100),
      ClientCountryName varchar(100),
      ClientEducationDetails varchar(200),
      PRIMARY KEY(ClientId)
   );

案例1 - 使用SHOW命令

这是查找MySQL中列名称的查询-

mysql> SHOW COLUMNS FROM DemoTable603;

这将产生以下输出-

+------------------------+--------------+------+-----+---------+----------------+
| Field                  | Type         | Null | Key | Default | Extra          |
+------------------------+--------------+------+-----+---------+----------------+
| ClientId               | int(11)      | NO   | PRI | NULL    | auto_increment |
| ClientName             | varchar(100) | YES  |     | NULL    |                |
| ClientAge              | int(11)      | YES  |     | NULL    |                |
| ClientAddress          | varchar(100) | YES  |     | NULL    |                |
| ClientCountryName      | varchar(100) | YES  |     | NULL    |                |
| ClientEducationDetails | varchar(200) | YES  |     | NULL    |                |
+------------------------+--------------+------+-----+---------+----------------+
6 rows in set (0.00 sec)

案例2-使用information_schema.column-

mysql> select column_name from information_schema.columns where table_schema='web' and table_name='DemoTable603';

这将产生以下输出-

+------------------------+
| COLUMN_NAME            |
+------------------------+
| ClientAddress          |
| ClientAge              |
| ClientCountryName      |
| ClientEducationDetails |
| ClientId               |
| ClientName             |
+------------------------+
6 rows in set (0.00 sec)

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如何在MySQL中查找列名？

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