[mysql] mysql workbench数据库字段属性含义

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 blob or similar, this indicates that is binary data, rather than text) 二进制(比text更大的二进制数据)

UN：unsigned (for integer types, see docs: “10.2. Numeric Types”) 整数

ZF：zero fill (rather a display related flag, see docs: “10.2. Numeric Types”)值中最有意义的字节总为0，并且不保存。

AI：auto increment (the column is auto incremented when rows are inserted) 自增

Default: 默认值