Is there a pure MySQL way of ordering elements by range? So let´s say I have table "products" with two columns for prices, one is the old price, one the new one. I now want to select all products and order them by the range of the previous price and the current price. So actually something like ORDER BY (previous_price - current_price). Is there any way to do that or do I need to use a programming language to reorder the array?
Exactly as you propose. But then the SQL way:
You select a field called price_range that equals previous_price - current_price:
SELECT (previous_price-current_price) as price_range
And then you order it:
ORDER BY price_range
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