sql - How can I update a column (multiple rows) in a table with the lower value between 2 column in 2 tables? -


i need compare comision of seller , comision of product , put lower value in comision column in details.

 table 1: details   doc  comision seller product 1       0      001     0101 1       0      001     0315 1       0      001     0425 2       0      001     0389 2       0      001     0315  table 2: products code  description   comision 0101  product 1        5 0315  product 2        7 0425  product 3        3 0389  product 4        8 . . .  table 3: sellers code  name         comision 001   seller 1        6 002   seller 2        3 . . .

i did this:

declare @comisionvendedor float,@comisionproducto float, @comision float,@prod='0101' set @comisionvendedor=0 set @comisionproducto=0 select @comisionvendedor=comision vendedor join details on seller.code=details.seller details.doc=1 , prod=@prod select @comisionproducto=products.comision products join details on products.code=details.product details.doc=1 , prod=@prod if @comisionvendedor>@comisionproducto begin set @comision=@comisionproducto end else begin set @comision=@comisionvendedor end  update details set comision=@comision details.doc=1 , product=@prod

it works fine 1 product. how can replace comision column of 3 rows doc number of 1?

you use printf command


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