如何在一行中将归类更改为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;
为了理解上述语法，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) -> );
检查表的DDL。语法如下：
SHOW CREATE TABLE yourTableName;
现在让我们检查表的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; Records: 0 Duplicates: 0 Warnings: 0
现在让我们检查表的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)