1、查看分区情况
SELECT PARTITION_NAME,TABLE_ROWS FROM INFORMATION_SCHEMA.PARTITIONS WHERE TABLE_NAME = 'tablename';
2、分区
2-1时间戳
alter table tablename algorithm=inplace, lock=none, drop primary key, add primary key (id, time);
alter table tablename partition by range columns (time) (
partition p1711 values less than (1512057599),
partition p1712 values less than (1514735999),
partition p0 values less than maxvalue
);
2-2字符串
alter table xw_user_applyloan_baoxian algorithm=inplace, lock=none, drop primary key, add primary key (id, time);
alter table tablename partition by range columns (UNIX_TIMESTAMP(time）) (
partition p1711 values less than (UNIX_TIMESTAMP('2007-11-30 23:59:59')),
partition p1712 values less than (UNIX_TIMESTAMP('2007-12-31 23:59:59')),
partition p0 values less than maxvalue
);
分区说明：如果有表中有主键，分区的字段也是需要设置为主键