minimum value

i have a table with two columns named cust and price, i want to write a rule
or something , the mininum value of the column price must be >= cust * 1,4 ,
the ideia is not permit write in price a value minor of 40 % profit, how i
can make this? i have try with a rule but do not work.
Thanks in advance
Alejandro Carnero"alecarnero" <alecarnero@.uol.com.br> wrote in message
news:%23SNZpoFIGHA.3896@.TK2MSFTNGP15.phx.gbl...
>i have a table with two columns named cust and price, i want to write a
>rule
> or something , the mininum value of the column price must be >= cust * 1,4
> ,
> the ideia is not permit write in price a value minor of 40 % profit, how i
> can make this? i have try with a rule but do not work.
> Thanks in advance
> Alejandro Carnero
>
>
Try a CHECK constraint. Something like:
CREATE TABLE #Foo (
ProductID int NOT NULL PRIMARY KEY,
CustomerID int NOT NULL, -- Foreign Key
BasePrice money CHECK(BasePrice >= 0.00),
CustomerPrice money,
CONSTRAINT profit_margin CHECK(CustomerPrice >= (BasePrice * 1.4))
)
Rick Sawtell
MCT, MCSD, MCDBA