mysql删除表编码字段_mysql中修改表的默认编码和表中字段的编码

Posted 2021-06-22 dreamw

https://blog.csdn.net/weixin_33635110/article/details/113157340

ALTER TABLE `table` DEFAULT CHARACTER SET utf8;

但是虽然修改了表的编码格式，但是字段的编码格式并没有修改过来，没有什么卵用

又发现一条语句，作用是修改字段的编码格式

ALTER TABLE `tablename` CHANGE `字段名1` `字段名2` VARCHAR(36) CHARACTER SET utf8 NOT NULL;

最后找到这么一条语句

alter table `tablename` convert to character set utf8;

它可以修改一张表的所有字段的编码格式，顿时方便多了

Ps ：延伸一下，修改mysql中所有表，所有字段编码，需要用到存储过程

转换表字段编码的sql语句为：alter table `tableName` convert to character set utf8\'

CREATE PROCEDURE `pr_convert_dbtab_utf8`(IN dbName varchar(100))

BEGIN

declare stop int default 0;

declare tabCount int default 0;

declare strSql varchar(1000);

declare name varchar(100);

declare cur CURSOR FOR select table_name from information_schema.tables where table_schema=dbName;

declare CONTINUE HANDLER FOR SQLSTATE \'02000\' SET stop = null;

OPEN cur;

FETCH cur INTO name;

WHILE ( stop is not null) DO

set tabCount=tabCount+1;

set strSql = concat(\'alter table `\',name,\'` convert to character set utf8\');

set @sql1 = strSql;

prepare stmt_p from @sql1;

execute stmt_p;

FETCH cur INTO name;

END WHILE;

CLOSE cur;

SELECT concat(\'table: \', tabCount);

END;

输入调用存储过程的命令，参数为需要转换的数据库名

mysql> call pr_convert_dbtab_utf8(\'jiradb\');

+-----------------------------+

| concat(\'table: \', tabCount) |

+-----------------------------+

| table: 245 |

+-----------------------------+

1 row in set

Query OK, 0 rows affected

mysql>
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原文链接：https://blog.csdn.net/weixin_33635110/article/details/113157340