partition by range
时间: 2023-09-09 21:09:11 浏览: 148
mysql-partition-and-Index.rar_partition
在SQL中,PARTITION BY语句用于将数据分区并按照指定的字段进行分组。而RANGE关键字主要用于窗口函数中,它指定了窗口的边界范围。具体来说,RANGE指定的是按照值的范围来进行计算,而不是按照行数来计算。在窗口函数中,可以使用PARTITION BY和RANGE关键字来对多个字段进行统计计算。例如,可以使用PARTITION BY depname进行部门内的数据分组,然后使用RANGE '30 minutes' PRECEDING来计算指定时间范围内的数据。<em>1</em><em>2</em><em>3</em>
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- *1* [建立范围分区 partition by range](https://blog.csdn.net/m0_37622868/article/details/82849108)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT0_1"}} ] [.reference_item]
- *2* *3* [PostgreSQL 的窗口函数 OVER, WINDOW, PARTITION BY, RANGE](https://blog.csdn.net/michaelchain/article/details/125001000)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT0_1"}} ] [.reference_item]
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