如何更改MySQL表中现有列的名称？
我们可以通过使用CHANGE语句和ALTER语句来更改MySQL表中特定现有列的名称。它的语法如下-
语法
ALTER TABLE table_name CHANGE old_column_name new_column_name datatype;
这里，
table_name是我们要从中删除列的表的名称。
Old_column_name是要更改的列的名称。
new_column_name是必须赋予旧列的列名。
示例
在此示例中，我们将表 “student_info”的列 “id” 的名称更改为 “studentid”，如下所示：
mysql> Select * from Student_info; +------+---------+------------+------------+ | id | Name | Address | Subject | +------+---------+------------+------------+ | 101 | YashPal | Amritsar | History | | 105 | Gaurav | Chandigarh | Literature | | 130 | Ram | Jhansi | Computers | | 132 | Shyam | Chandigarh | Economics | | 133 | Mohan | Delhi | Computers | +------+---------+------------+------------+ 5 rows in set (0.02 sec) mysql> ALTER TABLE Student_info CHANGE id studentid int; Records: 0 Duplicates: 0 Warnings: 0 mysql> Select * from Student_info; +-----------+---------+------------+------------+ | studentid | Name | Address | Subject | +-----------+---------+------------+------------+ | 101 | YashPal | Amritsar | History | | 105 | Gaurav | Chandigarh | Literature | | 130 | Ram | Jhansi | Computers | | 132 | Shyam | Chandigarh | Economics | | 133 | Mohan | Delhi | Computers | +-----------+---------+------------+------------+ 5 rows in set (0.00 sec)
上面的结果集显示列“id”的名称已更改为“Studentid”。