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  • 关于合并两个表数据的SQL方法

    今天遇到一个功能,需要在两个结构一样的表中统计预约方式的个数,关键点在于union all 和sum的使用

     1 select sum(y1) as y,a.name
     2 from(SELECT
     3         count(1) as y1,
     4         sdd.dict_label as name
     5 FROM
     6 ars_appointment_info aai
     7         JOIN sys_dict_data sdd
     8         on sdd.dict_value=aai.AppointmentChannel AND sdd.dict_type = 'ars_appointment_info_AppointmentChannel'
     9                 where AppointmentDate >='2020-6-2'
    10                 and AppointmentDate <= '2020-6-8'
    11         GROUP BY
    12         AppointmentChannel union all  
    13         SELECT
    14         count(1) as y2,
    15         sdd.dict_label as name
    16 FROM
    17 ars_appointment_info_non aai
    18         JOIN sys_dict_data sdd
    19         on sdd.dict_value=aai.AppointmentChannel AND sdd.dict_type = 'ars_appointment_info_AppointmentChannel'
    20                 where AppointmentDate >='2020-6-2'
    21                 and AppointmentDate <= '2020-6-8'
    22         GROUP BY
    23         AppointmentChannel) as a
    24         GROUP BY a.name
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  • 原文地址:https://www.cnblogs.com/itjunjun/p/13078746.html
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