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Legal Studies如何在 MySQL 中找到列的名稱？
為此，您可以使用 SHOW COLUMNS 或 INFORMATION_SCHEMA.COLUMN。
我們先建立一個表 -
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)
用例 1 − 使用 SHOW 命令
以下是查詢 MySQL 中列的名稱，查詢語句如下 −
mysql> SHOW COLUMNS FROM DemoTable603;
它將生成以下輸出 −
+------------------------+--------------+------+-----+---------+----------------+ | 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)
用例 2 − 使用 information_schema.column −
mysql> select column_name from information_schema.columns where table_schema='web' and table_name='DemoTable603';
它將生成以下輸出 −
+------------------------+ | COLUMN_NAME | +------------------------+ | ClientAddress | | ClientAge | | ClientCountryName | | ClientEducationDetails | | ClientId | | ClientName | +------------------------+ 6 rows in set (0.00 sec)
更新於： 22-Aug-2019
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