bitsCN.com[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[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。
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