标签：c ext int com a 数据
[intrinsic column flags] (基本字段类型标识)
- 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
- AI: auto increment (the column is auto incremented when rows are
inserted) 自增
www.2cto.com
[additional data type flags, depend on used data type]
扩展数据类型标记
- 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。
ps: ZF个人理解指的是带有小数占位符的数据相当于金额类型的数据。
mysql workbench建表时PK,NN,UQ,BIN,UN,ZF,AI,布布扣,bubuko.com
mysql workbench建表时PK,NN,UQ,BIN,UN,ZF,AI
标签：c ext int com a 数据
原文地址：http://www.cnblogs.com/yeminglong/p/3729254.html
