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如何更新MySQL表存储引擎

2024-04-27 09:47:03 350

按照以下语法更新MySQL表引擎-

语法

alter table yourTableName ENGINE=InnoDB;

让我们首先创建一个表-

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;

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)

这是更新MySQL表引擎的查询-

mysql> alter table DemoTable ENGINE=InnoDB;
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)

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如何更新MySQL表存储引擎

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