Mysql计数查询按年和月水平分组

Question

I am new to mysql query and i am stuck on getting query. Basically, i want the date to group as Year and month (Jan'17, Feb'17...) in horizontal way (column) as shown in Image below.

Data are shown in image below:

Please help to create query.

Answer 1

You can do conditional aggregation - once per login_id and then overall and then union both the results.

Select login_idindex,
  Sum(date_format(visitdate, '%Y%m')  = '201701' ) as jan_17,
  Sum(date_format(visitdate, '%Y%m')  = '201702' ) as feb_17,
  . . .,
  Count(*) as total
From your_table
Where visitdate between ? and ?
Group by login_idindex

Union all

Select null,
  Sum(date_format(visitdate, '%Y%m')  = '201701' ) as jan_17,
  Sum(date_format(visitdate, '%Y%m')  = '201702' ) as feb_17,
  . . .,
  Count(*) as total
From your_table
Where visitdate between ? and ?;

Replace ? with actual dates or remove the where clause if you are working with all the dates.