MySQL Workbench建表时PK, NN, UQ, BIN, UN...的意思

2015.09.10 | 683阅读 | 0条评论 | 数据库

- PK: primary key (column is part of a pk) 主关键字
- NN: not null (column is nullable) 不能为空
- UQ: unique (column is part of a unique key) 唯一的
- AI: auto increment (the column is auto incremented when rows are inserted) 自动加数
[additional data type flags, depend on used data type]
- BIN: binary (if dt is a blob or similar, this indicates that is binary data, rather than text) 二进制
- UN: unsigned (for integer types, see docs: “10.2. Numeric Types”)
- ZF: zero fill (rather a display related flag, see docs: “10.2. Numeric Types”)