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        如何在mysql中获得每个对应月份的第一天?

        How to get first day of every corresponding month in mysql?(如何在mysql中获得每个对应月份的第一天?)
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                2. 本文介绍了如何在mysql中获得每个对应月份的第一天?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  我想获得当年每个相应月份的第一天.例如,如果用户选择2010-06-15",则查询要求从2010-06-01"而不是2010-06-15"运行.

                  I want to get first day of every corresponding month of current year. For example, if user selects '2010-06-15', query demands to run from '2010-06-01' instead of '2010-06-15'.

                  请帮助我如何计算所选日期的第一天.目前,我正在尝试使用以下 mysql 选择查询来获得满意的结果:

                  Please help me how to calculate first day from selected date. Currently, I am trying to get desirable using following mysql select query:

                  Select
                    DAYOFMONTH(hrm_attendanceregister.Date) >=
                    DAYOFMONTH(
                      DATE_SUB('2010-07-17', INTERVAL - DAYOFMONTH('2010-07-17') + 1 DAY
                    )
                  FROM
                    hrm_attendanceregister;
                  

                  谢谢

                  推荐答案

                  这是您要找的:

                  select CAST(DATE_FORMAT(NOW() ,'%Y-%m-01') as DATE);
                  

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