mysql中根据月进行分组

最新推荐文章于 2024-08-02 04:11:46 发布

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最新推荐文章于 2024-08-02 04:11:46 发布

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本文介绍了一种在SQL中使用DATE_FORMAT()函数进行日期格式化的技巧，通过具体示例展示了如何按月对设备维修申报数据进行分组统计，适用于数据库管理和数据分析人员。

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SELECT
Count(*),
ri_equipmentmessage_equipment.equipment_Name,
ri_equipmentmessage_equipment.equipment_Code,
DATE_FORMAT(
		ri_repair_declarationsurface.report_Time,
		'%m'
	) AS months,
ri_department.departmentName
FROM
ri_repair_declarationsurface
INNER JOIN ri_equipmentmessage_equipment ON ri_repair_declarationsurface.equipment_Id = ri_equipmentmessage_equipment.id
INNER JOIN ri_department ON ri_equipmentmessage_equipment.department = ri_department.id
GROUP BY
	months,
ri_equipmentmessage_equipment.equipment_Code

主要是一个DATE_FORMAT()方法的使用

详细见

https://blog.youkuaiyun.com/benzun_yinzi/article/details/77449985