MySQL workbench中的PK,NN,UQ,BIN,UN,ZF,AI說明

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- PK: primary key (column is part of a pk) 主鍵
- NN: not null (column is nullable) 是否為空白  (非空)
- UQ: unique (column is part of a unique key) 唯一索引 (外鍵)
- AI: auto increment (the column is auto incremented when rows are inserted) 自動增加
- BIN: binary (if dt is a blob or similar, this indicates that is binary data, rather than text) 二進位(比text更大)
- UN: unsigned (for integer types, see docs: “10.2. Numeric Types”) 無符號整型(非負數)
- ZF: zero fill (rather a display related flag, see docs: “10.2. Numeric Types”) 補零 填充0 例如欄位內容是1 int(4), 則內容顯示為0001

MySQL workbench中的PK,NN,UQ,BIN,UN,ZF,AI說明

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