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需要设置collate(校对)规则

collate校对规则说明: 

*_bin: binary case sensitive collation,区分大小写

*_cs: case sensitive collation,区分大小写 

*_ci: case insensitive collation,不区分大小写


通过sql语句设置:

alter table table_1 modify field_1  varchar(50) binary comment 'field字段备注' ;

参考:
https://blog.csdn.net/weixin_42418755/article/details/113404092
https://blog.csdn.net/lijiechen0101/article/details/120533425