更新 MySQL 中的列大小并增加其大小？
要更新列大小，可以使用alter命令。语法如下 -
alter table yourTableName change yourColumnName yourColumnName data type;登录后复制
mysql> create table DataTruncated −> ( −> id int, −> Name varchar(5) −> ); Query OK, 0 rows affected (0.64 sec)登录后复制
mysql> insert into DataTruncated values(101,'JohnSmith'); ERROR 1406 (22001): Data too long for column 'Name' at row 1登录后复制
mysql> alter table DataTruncated change Name Name varchar(200); Query OK, 0 rows affected (2.01 sec) Records: 0 Duplicates: 0 Warnings: 0登录后复制
mysql> insert into DataTruncated values(101,'JohnSmith'); Query OK, 1 row affected (0.11 sec)登录后复制
mysql> select *from DataTruncated;登录后复制
+------+-----------+ | id | Name | +------+-----------+ | 101 | JohnSmith | +------+-----------+ 1 row in set (0.00 sec)登录后复制
