mysql分区管理语句

1.key分区语句：

ALTER TABLE order_info PARTITION BY KEY(orderSn) PARTITIONS 127;

2.rang分区语句：

ALTER TABLE `table`
partition by range(to_days(entertime))
(partition P0 values less than (to_days('2018-01-01')))
 
这里面需要生成一套代码：

<?php

$total = 257;
$str = "ALTER TABLE `order_goods`
partition by range(to_days(addTime))
(";
$time = "2019-07-01";
for($i=0;$i<=$total;$i++){
$stringTime = date('Ym',strtotime($time));
$newTime = date('Y-m-d',strtotime("+1 month",strtotime($time)));
//$strTime = date('Ymd',strtotime("+1 month",strtotime($time)));
$time = &$newTime;

$pName = 'p'.$stringTime;

$str .=" PARTITION ".$pName." VALUES LESS THAN (to_days('".$newTime."')) ENGINE = InnoDB,<br />";
}

$str .=");";

echo $str;exit;

?>

3.删除分区表：
alter table user_collection  REMOVE PARTITIONING