极客教程MySQL 如何在一行中更改排序规则为utf8_bin
您需要使用ALTER命令将排序规则更改为utf8_bin。 语法如下：
ALTER TABLE yourTableName COLLATE utf8_general_ci;
为了理解上面的语法，让我们创建一个表。 创建表的查询如下：
mysql> create table CollateDemo
-> (
-> Id int NOT NULL AUTO_INCREMENT,
-> Name varchar(20),
-> Age int,
-> PRIMARY KEY(Id)
-> );
Query OK, 0 rows affected (0.98 sec)
检查表的DDL, 语法如下：
SHOW CREATE TABLE yourTableName;
现在我们来检查一下我们的表的DDL：
mysql> show create table CollateDemo;
以下是输出：
+-------------+------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Table | Create Table |
+-------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| CollateDemo | CREATE TABLE `collatedemo` (`Id` int(11) NOT NULL AUTO_INCREMENT, `Name` varchar(20) DEFAULT NULL, `Age` int(11) DEFAULT NULL, PRIMARY KEY (`Id`) ) ENGINE = InnoDB DEFAULT CHARSET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci |
+-------------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)
现在您可以使用ALTER命令更改排序规则。查询如下：
mysql> alter table CollateDemo collate utf8_general_ci;
Query OK, 0 rows affected (0.39 sec)
Records: 0 Duplicates: 0 Warnings: 0
现在让我们来检查一下表的DDL：
mysql> show create table CollateDemo;
以下是输出：
+--------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| Table | Create Table |
+-------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| CollateDemo | CREATE TABLE `collatedemo` (`Id` int(11) NOT NULL AUTO_INCREMENT, `Name` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL, `Age` int(11) DEFAULT NULL, PRIMARY KEY (`Id`) ) ENGINE = InnoDB DEFAULT CHARSET = utf8 |
+-------------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)
阅读更多：MySQL 教程