Question

First i would like to thanks all friends,i got one case which made my php program running very slow.
here’s the problem,im updating new price for every item on specific branch.for example:
i got table call stock,with column -item,old price,new price,branch.i got total 3 branch stock in the same table.i would like to discount all the stock from branch call “CA”.so i

select * from stock where branch =="CA"

loop and retrive old price – 20%
insert into new price

this method really consume alot of time,i got more than 5million of record.does anyone have any better solution,i really appreciate.Thanks again

Answer 1

do an update statement,

UPDATE  stock
SET     newPrice = oldPrice - (oldPrice * .2)
WHERE   branch = 'CA'