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  • mysql workbench建表时PK,NN,UQ,BIN,UN,ZF,AI

    1、

    [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。
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  • 原文地址:https://www.cnblogs.com/zfxJava/p/5660457.html
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