mysql分区表

1、创建分区表

DROP TABLE IF EXISTS `tb_parttion`;
CREATE TABLE tb_parttion (
  `id` varchar(20) NOT NULL DEFAULT '',
  `name` varchar(255) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `ssq` varchar(6) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL,
  `dp_dm` varchar(10) CHARACTER SET utf8 COLLATE utf8_general_ci NULL DEFAULT NULL
)
PARTITION BY LIST COLUMNS(ssq) (
    PARTITION p201901 VALUES IN ('201901'), 
    PARTITION p201902 VALUES IN ('201902'), 
        PARTITION p201903 VALUES IN ('201903'), 
        PARTITION p201904 VALUES IN ('201904')
);

2、查看分区

SELECT
  partition_name part,
  partition_expression expr,
  partition_description descr,
  FROM_DAYS(partition_description) lessthan_sendtime,
  table_rows
FROM INFORMATION_SCHEMA.partitions
WHERE TABLE_SCHEMA = SCHEMA() AND TABLE_NAME='tb_parttion'; 

3、动态添加分区

ALTER TABLE tb_parttion ADD PARTITION (
    PARTITION bbb VALUES IN ('bbb')
)

4、动态删除分区

ALTER TABLE tb_parttion DROP PARTITION bbb;

5、清空分区数据

ALTER TABLE tb_parttion TRUNCATE PARTITION bbb;