?
Solved

Work out every 8 weeks from a start date in Microsoft sql 2005

Posted on 2011-09-23
3
Medium Priority
?
372 Views
Last Modified: 2012-05-12
Hi everyone.

Can any please help me. I hope i explain this right

I have a sql table, with name addresses, emails etc, but have 2 extra, DateStarted, WeekPeriod

Now, i want to send an email every day, to these people, but, if WeekPeriod = 8 then i only send the email once in every 8 weeks, same as it was 4, then i send the email every 4 weeks from DateStarted.

Normall, i would write a command for each week and just allow x amount of entries, but this needs to be fully dynamic.

Can anyone understand what i mean and able to help.

Thank you
Baker


0
Comment
Question by:Bakersville
3 Comments
 
LVL 7

Accepted Solution

by:
Jacobfw earned 2000 total points
ID: 36586487
Something like:

find the days between current date and date started
divide by seven to find weeks
divide by weekperiod
sutract the same (but rounded)
if not equal zero, it is not the correct week

where trunc(days_between(DateStarted,sysdate)/7,0)/WeekPeriod - trunc((trunc(days_between(DateStarted,sysdate)/7,0)/WeekPeriod),0) = 0

0
 
LVL 37

Expert Comment

by:TommySzalapski
ID: 36586489
The datediff function can be done by weeks
SELECT *
FROM table
WHERE DATEDIFF(ww,DateStarted,GETDATE()) = WeekPeriod

And you would run the query once per week.

If you wanted to run it once per day, then you would want
SELECT *
FROM table
WHERE DATEDIFF(day,DateStarted,GETDATE()) = 7*WeekPeriod
0
 
LVL 1

Author Closing Comment

by:Bakersville
ID: 36600703
Thank you for your response.  Worked a treat..
0

Featured Post

The new generation of project management tools

With monday.com’s project management tool, you can see what everyone on your team is working in a single glance. Its intuitive dashboards are customizable, so you can create systems that work for you.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In this post we will learn how to make Android Gesture Tutorial and give different functionality whenever a user Touch or Scroll android screen.
When you see single cell contains number and text, and you have to get any date out of it seems like cracking our heads.
The viewer will learn how to user default arguments when defining functions. This method of defining functions will be contrasted with the non-default-argument of defining functions.
With the power of JIRA, there's an unlimited number of ways you can customize it, use it and benefit from it. With that in mind, there's bound to be things that I wasn't able to cover in this course. With this summary we'll look at some places to go…
Suggested Courses

588 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question