如何更新MySQL数据表存储引擎
要更新MySQL表引擎,请按照以下语法 –
阅读更多:MySQL 教程
语法
alter table yourTableName ENGINE=InnoDB;
让我们先创建一个表 –
mysql> create table DemoTable
-> (
-> StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY,
-> StudentName varchar(20),
-> StudentAge int,
-> StudentCountryName varchar(20)
-> )ENGINE=MyISAM,AUTO_INCREMENT=101;
Query OK, 0 rows affected (0.18 sec)
让我们检查表的描述 –
mysql> show create table DemoTable;
这将产生以下输出 –
+---------------+-----------------------------------------------------------------------------------------+
| Table | Create Table |
+---------------+-----------------------------------------------------------------------------------------+
| DemoTable | CREATE TABLE `DemoTable` ( `StudentId` int(11) NOT NULL AUTO_INCREMENT, `StudentName` varchar(20) COLLATE utf8_unicode_ci DEFAULT NULL, `StudentAge` int(11) DEFAULT NULL,
`StudentCountryName` varchar(20) COLLATE utf8_unicode_ci DEFAULT NULL, PRIMARY KEY (`StudentId`) ) ENGINE=MyISAM AUTO_INCREMENT=101 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci |
+---------------+------------------------------------------------------------------------------------------+
1 row in set (0.50 sec)
这是用于更新MySQL表引擎的查询 –
mysql> alter table DemoTable ENGINE=InnoDB;
Query OK, 0 rows affected (1.21 sec)
Records: 0 Duplicates: 0 Warnings: 0
让我们再次检查表的描述 –
mysql> show create table DemoTable;
这将产生以下输出 –
+---------------+-----------------------------------------------------------------------------------------+
| Table | Create Table |
+---------------+-----------------------------------------------------------------------------------------+
| DemoTable | CREATE TABLE `DemoTable` ( `StudentId` int(11) NOT NULL AUTO_INCREMENT, `StudentName` varchar(20) COLLATE utf8_unicode_ci DEFAULT NULL, `StudentAge` int(11) DEFAULT NULL,
`StudentCountryName` varchar(20) COLLATE utf8_unicode_ci DEFAULT NULL, PRIMARY KEY (`StudentId`) ) ENGINE=InnoDB AUTO_INCREMENT=101 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci |
+---------------+------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)