Select Results on a Rolling Time Period


I'm using PHP/MySQL to return data sets on a daily basis.

But what's the WHERE clause statement to extract results from a SELECT query perhaps on a rolling weekly, monthly or quarterly basis?

I'm asking so that the Select query returns a constant moving set of results set based on the data found in the database.

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Peos JohnPHPCommented:
Can you please give little more detail above the columns you have?

Do you want to fetch the data from the table based on any Date column you have?

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RidgejpAuthor Commented:

Yes so a typical query might look like: -

SELECT orderID, buyerName, BuyerAddress1, BuyerAddress2, BuyerAddress3, buyerCounty, buyerPCD, catID, quantity, totalPrice FROM salesuk WHERE invoiceDate >= "01/01/2017" ORDER BY DESC;

That type of query ... hope that helps?

SharathData EngineerCommented:
Can you provide some sample data and expected result?
RidgejpAuthor Commented:
This is the code I was looking for, which produces a 21 rolling day view: -

WHERE invoiceDate >= now() - INTERVAL 21 DAY
RidgejpAuthor Commented:
Thanks for the prompt made me realise I knew enough to work it out!
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