mysql> ALTER TABLE KEYCHAIN CONVERT TO CHARACTER SET UTF8; Query OK, 1 row affected (0.02 sec) Records: 1 Duplicates: 0 Warnings: 0
2.4.1 insert 在表中添加列(字段)
mysqlPEOPLE add star BOOL; Query OK, 0 rows affected (0.02 sec) Records: 0 Duplicates: 0 Warnings: 0
提示:在MySQL里,布尔类型会自动转换为tinyint(1)类型。
我们不妨使用desc去查看一下PEOPLE表结构:
mysql> desc PEOPLE; Field Extra ID auto_increment (AGE BIRTHDAY YES star rows in set (0.00 sec)
现在,你该相信我了吧?
2.4.2 alter 修改表(列)字段