摘要: ==字段约束条件== ==无符号、零填充== unsigned id int unsigned zerofill id int(5) zerofill ==非空== create table t1( id int, name varchar(16) ); insert into t1(id) val 阅读全文
posted @ 2022-11-24 17:28 缀月 阅读(145) 评论(0) 推荐(0) 编辑