Question

In my database I am storing week numbers and the relating years. For example something like this:

id | week | year | text
---+------+------+-----------
 1 |  23  | 2012 | hello
 2 |  27  | 2012 | something
 3 |  39  | 2012 | more text
 4 |  43  | 2012 | more text

Then on the front end the user can select a week and a year and I then want to be able to return all records between that range. For example selecting between week 25 – 2012 and week 50 – 2012 would return the last 3 records.

I’m not sure whether it will be easier to also hold the first date of the week as well and search on this or if there is a way to search on weeks easily.

Thanks in advance.

Answer 1

Presumably, you want consecutive weeks, even when the year is different. To do this, some arithmetic helps:

select text
from dates
where year*100 + week between $weekmin+$yearmin*100 and $weekmax+$yearmax*100 

This converts, say, week 7 in 2012 to “201207” for comparison purposes.