目录1. 批量修改库字符集2. 批量修改表字符集3. 批量修改列字符集从低版本迁移到Mysql 8后，可能由于字符集问题出现 Illegal mix of collations (utf8mb4_general_ci,I
从低版本迁移到Mysql 8后，可能由于字符集问题出现 Illegal mix of collations (utf8mb4_general_ci,IMPLICIT) and (utf8mb4_0900_ai_ci,IMPLICIT) 错误，此时要修改对象的字符集。
change_database_characset.sql
select concat('alter database ',schema_name,' default character set utf8mb4 collate utf8mb4_0900_ai_ci;')
from infORMation_schema.schemata
where schema_name not in ('sys','mysql','performance_schema','information_schema')
and lower(default_collation_name) in ('utf8mb4_general_ci','utf8_general_ci');
调用：
/home/mysql/mysql-8.0.16-linux-glibc2.12-x86_64/bin/mysql -uroot -h10.0.0.18 -P3306 -p70n6w+1XklMu -N < change_database_characset.sql > change_database_characset_result.sql
/home/mysql/mysql-8.0.16-linux-glibc2.12-x86_64/bin/mysql -uroot -h10.0.0.18 -P3306 -p70n6w+1XklMu -f < change_database_characset_result.sql > change_database_characset_result.out 2>&1
change_table_characset.sql
select concat('alter table ',table_schema,'.',table_name,' default character set utf8mb4 collate = utf8mb4_0900_ai_ci;')
from information_schema.tables where table_schema not in ('sys','mysql','performance_schema','information_schema')
and table_type='BASE TABLE' and lower(table_collation) in ('utf8mb4_general_ci','utf8_general_ci');
调用：
/home/mysql/mysql-8.0.16-linux-glibc2.12-x86_64/bin/mysql -uroot -h10.0.0.18 -P3306 -p70n6w+1XklMu -N < change_table_characset.sql > change_table_characset_result.sql
/home/mysql/mysql-8.0.16-linux-glibc2.12-x86_64/bin/mysql -uroot -h10.0.0.18 -P3306 -p70n6w+1XklMu -f < change_table_characset_result.sql > change_table_characset_result.out 2>&1
change_column_characset.sql
set group_concat_max_len=10240;
select concat(c1,c2,';')
from (select c1, group_concat(c2) c2
from (select concat('alter table ',t1.table_schema,'.',t1.table_name) c1,concat(' modify ','`',t1.column_name,'` ',t1.data_type,
if (t1.data_type in ('varchar','char'),concat('(',t1.character_maximum_length,')'),''),
' character set utf8mb4 collate utf8mb4_0900_ai_ci',if(t1.is_nullable='NO',' not null',' null'),' comment ','''',t1.column_comment,'''') c2
from information_schema.columns t1, information_schema.tables t2
where t1.table_schema=t2.table_schema and t1.table_name=t2.table_name and t2.table_type='BASE TABLE'
and lower(t1.collation_name) in ('utf8mb4_general_ci','utf8_general_ci') and t1.table_schema not in ('sys','mysql','performance_schema','information_schema')) t1
group by c1) t;
调用：
/home/mysql/mysql-8.0.16-linux-glibc2.12-x86_64/bin/mysql -uroot -h10.0.0.18 -P3306 -p70n6w+1XklMu -N < change_column_characset.sql > change_column_characset_result.sql
/home/mysql/mysql-8.0.16-linux-glibc2.12-x86_64/bin/mysql -uroot -h10.0.0.18 -P3306 -p70n6w+1XklMu -f < change_column_characset_result.sql > change_column_characset_result.out 2>&1
到此这篇关于MySQL8 批量修改字符集脚本的文章就介绍到这了,更多相关MySQL8批量修改字符集内容请搜索我们以前的文章或继续浏览下面的相关文章希望大家以后多多支持我们！
--结束END--
本文标题: MySQL8 批量修改字符集脚本
本文链接: https://www.lsjlt.com/news/201118.html(转载时请注明来源链接)
有问题或投稿请发送至: 邮箱/279061341@qq.com QQ/279061341
下载Word文档到电脑，方便收藏和打印～
2024-05-16
2024-05-16
2024-05-16
2024-05-15
2024-05-15
2024-05-15
2024-05-15
2024-05-15
2024-05-15
2024-05-15
回答
回答
回答
回答
回答
回答
回答
回答
回答
回答
官方手机版
微信公众号
商务合作
0