在命令行shell上

如果你是一个命令行shell，你可以非常快地做到这一点。只需填写“dbname”:D

DB="dbname"
(
    echo 'ALTER DATABASE `'"$DB"'` CHARACTER SET utf8 COLLATE utf8_general_ci;'
    mysql "$DB" -e "SHOW TABLES" --batch --skip-column-names \
    | xargs -I{} echo 'ALTER TABLE `'{}'` CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;'
) \
| mysql "$DB"

简单复制/粘贴的一行程序

DB="dbname"; ( echo 'ALTER DATABASE `'"$DB"'` CHARACTER SET utf8 COLLATE utf8_general_ci;'; mysql "$DB" -e "SHOW TABLES" --batch --skip-column-names | xargs -I{} echo 'ALTER TABLE `'{}'` CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;' ) | mysql "$DB"

Alter table table_name charset = 'utf8';

这是一个简单的查询，我能够使用我的情况下，你可以改变table_name根据您的需求(s)。

命令行解决方案和排除视图

我只是在为像我和布莱恩这样在我们的数据库中有视图的人完成@Jasny的回答。

如果你有这样的错误:

ERROR 1347 (HY000) at line 17: 'dbname.table_name' is not of type 'BASE TABLE'

这是因为你可能有自己的观点，你需要排除它们。 但是当试图排除它们时，MySQL返回2列而不是1列。

SHOW FULL TABLES WHERE Table_Type = 'BASE TABLE';
-- table_name1  BASE TABLE
-- table_name2  BASE TABLE

因此，我们必须用awk修改Jasny的命令，只提取包含表名的第一列。

DB="dbname"
(
    echo 'ALTER DATABASE `'"$DB"'` CHARACTER SET utf8 COLLATE utf8_general_ci;'
    mysql "$DB" -e "SHOW FULL TABLES WHERE Table_Type = 'BASE TABLE'" --batch --skip-column-names \
    | awk '{print $1 }' \
    | xargs -I{} echo 'ALTER TABLE `'{}'` CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;'
) \
| mysql "$DB"

简单复制/粘贴的一行程序

DB="dbname"; ( echo 'ALTER DATABASE `'"$DB"'` CHARACTER SET utf8 COLLATE utf8_general_ci;'; mysql "$DB" -e "SHOW FULL TABLES WHERE Table_Type = 'BASE TABLE'" --batch --skip-column-names | awk '{print $1 }' | xargs -I{} echo 'ALTER TABLE `'{}'` CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;' ) | mysql "$DB"

你可以创建sql来更新所有的表:

SELECT CONCAT("ALTER TABLE ",TABLE_SCHEMA,".",TABLE_NAME," CHARACTER SET utf8 COLLATE utf8_general_ci;   ",
    "ALTER TABLE ",TABLE_SCHEMA,".",TABLE_NAME," CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;  ") 
    AS alter_sql
FROM information_schema.TABLES
WHERE TABLE_SCHEMA = "your_database_name";

捕获输出并运行它。

阿诺德•丹尼尔斯(Arnold Daniels)的回答更为优雅。

在命令行shell上

如果你是一个命令行shell，你可以非常快地做到这一点。只需填写“dbname”:D

DB="dbname"
(
    echo 'ALTER DATABASE `'"$DB"'` CHARACTER SET utf8 COLLATE utf8_general_ci;'
    mysql "$DB" -e "SHOW TABLES" --batch --skip-column-names \
    | xargs -I{} echo 'ALTER TABLE `'{}'` CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;'
) \
| mysql "$DB"

简单复制/粘贴的一行程序

DB="dbname"; ( echo 'ALTER DATABASE `'"$DB"'` CHARACTER SET utf8 COLLATE utf8_general_ci;'; mysql "$DB" -e "SHOW TABLES" --batch --skip-column-names | xargs -I{} echo 'ALTER TABLE `'{}'` CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;' ) | mysql "$DB"

Make a backup! Then you need to set the default char sets on the database. This does not convert existing tables, it only sets the default for newly created tables. ALTER DATABASE dbname CHARACTER SET utf8 COLLATE utf8_general_ci; Then, you will need to convert the char set on all existing tables and their columns. This assumes that your current data is actually in the current char set. If your columns are set to one char set but your data is really stored in another then you will need to check the MySQL manual on how to handle this. ALTER TABLE tbl_name CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;