What does each record represent?
What is the GTIN field? What does a value in this field identify?
gtin is a product identifier. in this table we have several products prices.
that means for product "123456789" i can see prices for each day.
so each record represent a price of one product for one day.
so i want to find is all products which lost the price rank of 1 of yesterday to lets say price rank 2 of today.
I was hoping that was the case as we can then use the gtin field as a match field in a sorted self join relationship to access data for the same product from the previous day in a calculation that will flag all records where the previous rank was 1 but that the current rank is not.
YourTable::gtin = YourTable 2::gtin and
YourTable::date > YourTable 2::Date
Double click the relationship line between these two table occurrences and click the sort button on the YourTable 2 side to specify that the YourTable 2 records be sorted by Date in descending order. This will make yesterdays record for the same product the first related record.
Then this calculation:
YourTable 2::Rank = 1 And YourTable::Rank ≠ 1
will return 1 (True) only in cases where the rank changed from yesterday's 1 to a lesser rank today. While it's an unstored record and thus slow to sort and search on, performing a find for all records that have 1 in this calculation field will pull up all products that fell out of the top rank today.
Ah Great, i got that!
just one further question:
How do i fill in a calculation into Perform find?
In this case, you don't. You define a calculation field for this and enter a 1 as your find criteria in perform find.
In cases where you do need to use a calculation to produce find criteria, use the scripted methods shown in this thread: Scripted Find Examples
Ah, i got that too. I did not realise that there is a add button :) so i thought it only allows one funktion.
...that was a true nightmare.
and thanx alot for your detailed and very prescise description, i dont want to know how long i would have spend by myself!
i have another problem
lets say i have a price database with 4 fields GTIN, DATE, PRICE, PRICERANK, SHOP
where shop is an url. now i also want to blacklist several shop, so they dot apear in the first sorting order.
so when i do this serach for changes from yesterday to today, those entry done apear because they contain a shop value that i store in another list.