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