mysql分区表创建思路
mysql分区表有range,list,hash,key,其中每个分区又有特殊的类型。对于RANGE分区,有RANGE COLUMNS分区。对于LIST分区,有LIST COLUMNS分区。对于HASH分区,有LINEAR HASH分区。对于KEY分区,有LINEAR KEY分区。具体想知道是什么看下面链接
https://www.cnblogs.com/ivictor/p/5033708.html
二话不话,下面是直接处理分区表的操作。
1、直接使用语句增加分区表,这个操作会自动将数据弄到新的分区表,然后删除原表。如果数据量很大,很占服务器资源(??其实我真没有测试过,不知道到底是不是的)
ALTER TABLE tbl_rtdata PARTITION BY RANGE (Month(fld_date)) ( PARTITION p_Apr VALUES LESS THAN (TO_DAYS('2012-05-01')), PARTITION p_May VALUES LESS THAN (TO_DAYS('2012-06-01')), PARTITION p_Dec VALUES LESS THAN MAXVALUE );
2、新建一个跟原来的表一样的结果,将新的表进行分区,然后将原来的表导出,将原来的表改名为另一上名,将新的表改为原来的表的名字,然后导入数据
CREATE TABLE `apdailysts_p` ( `id` INT(11) NOT NULL AUTO_INCREMENT, `ap_id` INT(11) NOT NULL, `mac` VARCHAR(17) NOT NULL, `liveinfo` LONGTEXT NOT NULL, `livetime` INT(11) NOT NULL, `stsdate` DATE NOT NULL, `lastmodified` DATETIME NOT NULL, PRIMARY KEY (`id`, `stsdate`) ) PARTITION BY RANGE COLUMNS(stsdate) ( PARTITION p0 VALUES LESS THAN ('2016-06-01'), PARTITION p1 VALUES LESS THAN ('2016-07-01'), PARTITION p2 VALUES LESS THAN ('2016-08-01'), PARTITION p3 VALUES LESS THAN ('2016-09-01'), PARTITION p4 VALUES LESS THAN ('2016-10-01'), PARTITION p5 VALUES LESS THAN ('2016-11-01'), PARTITION p6 VALUES LESS THAN ('2016-12-01'), PARTITION p7 VALUES LESS THAN ('2017-01-01'), PARTITION p8 VALUES LESS THAN ('2017-02-01'), PARTITION p9 VALUES LESS THAN ('2017-03-01'), PARTITION p10 VALUES LESS THAN ('2017-05-01'), PARTITION p11 VALUES LESS THAN ('2017-06-01'), PARTITION p12 VALUES LESS THAN ('2017-07-01'), PARTITION p13 VALUES LESS THAN ('2017-08-01'), PARTITION p14 VALUES LESS THAN ('2017-09-01'), PARTITION p15 VALUES LESS THAN MAXVALUE );
导出数据
mysqldump -u dbname -p --no-create-info dbname apdailysts > apdailysts.sql
导入数据
mysql-u dbname -p dbname < apdailysts.sql
不知道为毛,我1G的数据导入N分钟都没导完。应该可加些参数。等我找到答案再来更新