如何更新 MySQL 表存储引擎
mysqlmysqli database
要更新 MySQL 表引擎，请遵循以下语法 −
语法
alter table yourTableName ENGINE=InnoDB;
首先我们创建一个表 −
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)
让我们检查一下表的描述 −
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
让我们再次检查一下表的描述 −
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)
