MySQL Workbench建表时PK, NN, UQ, BIN, UN...的意思

emacsense

1. - PK: primary key (column is part of a pk)
2. - NN: not null (column is nullable)
3. - UQ: unique (column is part of a unique key)
4. - AI: auto increment (the column is auto incremented when rows are inserted)
6. [additional data type flags, depend on used data type]
7. - BIN: binary (if dt is a blob or similar, this indicates that is binary data, rather than text)
8. - UN: unsigned (for integer types, see docs: “10.2. Numeric Types”)
9. - ZF: zero fill (rather a display related flag, see docs: “10.2. Numeric Types”)