mysql range分区是什么

CREATE TABLE

    `Order` (

        `id`

        INT NOT NULL AUTO_INCREMENT,

        `partition_key`

        INT NOT NULL,

        `amt`

        DECIMAL(5) NULL) PARTITION BY RANGE(partition_key)

PARTITIONS 5(

    PARTITION part0 VALUES LESS THAN(201901),

    PARTITION part1 VALUES LESS THAN(201902),

    PARTITION part2 VALUES LESS THAN(201903),

    PARTITION part3 VALUES LESS THAN(201904),

    PARTITION part4 VALUES LESS THAN(201905),

    PARTITION part4 VALUES LESS THAN MAXVALUE;

INSERT INTO `Order` (`id`, `partition_key`, `amt`) VALUES ('1', '201901', '1000');

INSERT INTO `Order` (`id`, `partition_key`, `amt`) VALUES ('2', '201902', '800');

INSERT INTO `Order` (`id`, `partition_key`, `amt`) VALUES ('3', '201903', '1200');