MySQL Getting Records over the Last Working Week

问题

I'm using

 WHERE WEEK(curdate,3)-WEEK(date)=1 

to get all lines of a table that are recorded on the last working week (Monday to Sunday). Works well the whole year, but in January that will return 0 for some time, so I have to take

 WHERE WEEK(curdate,3)+53-WEEK(date)

in that case. I can't use OR because it would take both current year info and last year info when both exist. I already tried COALESCE and IFNULL methods:

 WHERE COALESCE(
     (WEEK(curdate(),3)-WEEK(date,3) = 1),
     (WEEK(curdate(),3)+53-WEEK(date,3) = 1
 )

It works well for the whole year but doesn't manage the case when IFNULL is true. Please give me advice on effective handling of this case.

回答1:

You can get the date of the Monday of the current week using:

select SUBDATE(curdate(), WEEKDAY(curdate()));

and then use the date of the Monday of this week and the Monday of the previous week in your predicate:

WHERE date >= SUBDATE(curdate(), WEEKDAY(curdate())) - interval 1 week
AND date < SUBDATE(curdate(), WEEKDAY(curdate()))

来源：https://stackoverflow.com/questions/15154655/mysql-getting-records-over-the-last-working-week