Hi,
I have to collect lots of prices from web sites and keep track of their
changes. What is the best option?
1) one 'price' row per price change:
create table price (
id_price primary key,
id_product integer references product,
price integer
);
2) a single 'price' row containing all the changes:
create table price (
id_price primary key,
id_product integer references product,
price integer[] -- prices are 'pushed' on this array as they
change
);
Which is bound to give the best performance, knowing I will often need
to access the latest and next-to-latest prices?
Thanks,
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