close ad
Help us test the new Databridge BETA with MySQLi support
open ad
View Menu

Technical Support Forums

Free, outstanding support from WebAssist and your colleagues

Increase ID by one every 7 days

Thread began 5/19/2010 10:51 am by John Langer | Last modified 6/21/2010 8:22 am by John Langer | 3437 views | 42 replies

CraigRBeta Tester

still thinking out loud here.

if we were to calculate datediff(todays date, fixed start date) and divide by 7, then we can calculate number of weeks since a fixed point in time.

taking a mod(20) of this value would always provide a number between 1 and 20, so this value can be used to select the 'active' row.

Using this method, we would always be in sequence.

does this seem plausible ?

***

If so, here is my rough and ready SQL...

SELECT * FROM toptenlist
WHERE topTenListID = (mod(round((datediff(curdate(), '2008-10-10')/7),0),3)+1)

2008-10-10 is just an arbitrary date
+1 is required at the end in case the modulus returns 0

(in the example above, i used a modulus of 3 (in red), but this number should be the same as the number of rows in the table.

Feel free to point out the errors in my logic !! :-)

It kept my brain going anyway.

Hope this helps

Build websites with a little help from your friends

Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.

Build websites from already-built web applications

These out-of-the-box solutions provide you proven, tested applications that can be up and running now.  Build a store, a gallery, or a web-based email solution.

Want your website pre-built and hosted?

Close Windowclose

Rate your experience or provide feedback on this page

Account or customer service questions?
Please user our contact form.

Need technical support?
Please visit support to ask a question

Content

rating

Layout

rating

Ease of use

rating

security code refresh image

We do not respond to comments submitted from this page directly, but we do read and analyze any feedback and will use it to help make your experience better in the future.

Close Windowclose

We were unable to retrieve the attached file

Close Windowclose

Attach and remove files

add attachmentAdd attachment
Close Windowclose

Enter the URL you would like to link to in your post

Close Windowclose

This is how you use right click RTF editing

Enable right click RTF editing option allows you to add html markup into your tutorial such as images, bulleted lists, files and more...

-- click to close --

Uploading file...