摘要: PK: primary key (column is part of a pk) 主键 NN:not null (column is nullable) 非空 UQ:unique (column is part of a unique key) 唯一 BIN:binary (if dt is a b 阅读全文
posted @ 2016-02-18 14:03 forwhy 阅读(1469) 评论(0) 推荐(0) 编辑