流式写数据.

ErrEmptyResult occurs when target of Scan isn't slice and the result of the query is empty.

ErrNilRows means the first param can't be a nil.

ErrSliceToString means only []uint8 can be transmuted into string.

ErrTargetNotSettable means the second param of Bind is not settable.

ScanErr will be returned if an underlying type couldn't be AssignableTo type of target field.