如何在MySQL表中更改列名？

要更改列名，请在列名后使用AS关键字。首先，让我们创建一个表 –

mysql> create table DemoTable
(
   Id int,
   StudentFirstNameInCollege varchar(100)
);
Query OK, 0 rows affected (0.68 sec)

使用插入命令将数据插入表中 –

mysql> insert into DemoTable values(100,'Chris');
Query OK, 1 row affected (0.19 sec)
mysql> insert into DemoTable values(101,'Bob');
Query OK, 1 row affected (0.21 sec)
mysql> insert into DemoTable values(102,'David');
Query OK, 1 row affected (0.21 sec)

使用select语句显示表中所有记录 –

mysql> select *from DemoTable;

这将产生以下输出 –

+------+---------------------------+
| Id   | StudentFirstNameInCollege |
+------+---------------------------+
| 100  | Chris                     |
| 101  | Bob                       |
| 102  | David                     |
+------+---------------------------+
3 rows in set (0.00 sec)

以下是使用AS关键字在MySQL中更改列名的查询 –

mysql> select Id,StudentFirstNameInCollege AS Name from DemoTable;

这将产生以下输出 –

+------+-------+
| Id   | Name  |
+------+-------+
| 100  | Chris |
| 101  | Bob   |
| 102  | David |
+------+-------+
3 rows in set (0.00 sec)

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