Applying Equation to Decimal Values In Query

[oddz]

Would it be possible to replace the ? with the price and calculate new price as a result of the calculation given the below scenario in a query? Essentially I'm looking for some way to eval() in SQL I believe…

I have a client who would like to be able set dynamic pricing on products based on equations being applied to the distributors price of the product. However, if I handle this in the application language I loose mySQL sorting and grouping abilities that I really need to calculate price ranges and what not. So this seems like the *best* idea…

thanks

CREATE TABLE prices (
	prices_id MEDIUMINT UNSIGNED NOT NULL AUTO_INCREMENT
	,price DECIMAL(20,2) NOT NULL DEFAULT '0.00'
	,PRIMARY KEY(prices_id)
) ENGINE=MyISAM DEFAULT CHARSET = utf8;
 
CREATE TABLE formulas (
	formulas_id MEDIUMINT UNSIGNED NOT NULL AUTO_INCREMENT
	,formula VARCHAR(96) NOT NULL
	,PRIMARY KEY(formulas_id)
) ENGINE=MyISAM DEFAULT CHARSET = utf8;
 
INSERT INTO prices (price) VALUES ('20.00'),('40.00'),('60.00'),('100.00')
 
INSERT INTO formulas (formula) VALUES ('?+20.00'),('?*2.00'),('?-5.00')
 
SELECT
     p.price
     ,f.formula
     ,'???' AS RESULT
  FROM
     prices p
 CROSS
  JOIN
     formulas f;