如何在我的sql中获取月份中每个月的第一天的数据？

Question

I have a table samples. It has data of every day of every month

  date         m1   m2   m3
'2017-01-01'   10   11    12
'2017-01-02'   10   10    12
'2017-01-03'   10   11    12
'2017-01-04'   10   8     12
'2017-02-01'   10   6     12
'2017-02-02'   10   14    12

I want the data like this

 date         m1   m2   m3
'2017-01-01'   10   11   12
'2017-02-01'   10   6    12

Answer 1

SELECT * from `Table` WHERE date_format(date,"%d") = '01'

Answer 2

You can use following querys

select * from your_table_name
where `date`= DATE_FORMAT(`date` ,'2017-%m-01')

or

select * from your_table_name
where DAY(`date`)= '01' and YEAR(`date`)='2017'

Note that this will return records of every first day of months for the year 2017