如何在 MySQL 中查找列的名称?
mysqlmysqli database
为此，您可以使用 SHOW COLUMNS 或 INFORMATION_SCHEMA.COLUMN。
首先我们创建一个表 −
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) ); Query OK, 0 rows affected (0.59 sec)
案例 1− 使用 SHOW 命令
以下是在 MySQL 中查找列名称的查询 −
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)
