mysql常用的一些命令,用于查看数据库、表、字段编码

‘collation_%‘; show variables like ‘character_set_%‘;

创建和修改数据库字符集：

create database mydb character set utf8 collate utf8_general_ci;
alter database mini default character set = gb2312; 

修改数据表字符集：

alter table pub_logs default character set = gb2312;
alter table pub_logs convert to character set gb2312;

生成批量修改表字符集：

SELECT a.TABLE_TYPE,CONCAT(‘alter TABLE ‘,A.TABLE_NAME,‘ default character set = gb2312;‘)  FROM INFORMATION_SCHEMA.TABLES A
WHERE A.TABLE_SCHEMA=‘MINI‘
AND a.TABLE_TYPE=‘BASE TABLE‘

生成批量修改列字符集：

SELECT CONCAT(CONCAT(CONCAT(‘alter TABLE ‘,c.TABLE_NAME,‘ modify‘),CONCAT(‘ ‘,C.COLUMN_NAME,‘ ‘),C.COLUMN_TYPE),‘ ‘,‘ character set gb2312 COLLATE gb2312_chinese_ci;‘) AS CLOU
FROM 
INFORMATION_SCHEMA.COLUMNS C,INFORMATION_SCHEMA.TABLES A
WHERE c.TABLE_SCHEMA=‘MINI‘
  AND A.TABLE_NAME=c.TABLE_NAME
  AND A.TABLE_TYPE=‘BASE TABLE‘
  AND c.DATA_TYPE=‘varchar‘
  ;

mysql常用的一些命令,用于查看数据库、表、字段编码

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