First, add comment to your code explaining what it's meant to be doing, in particular what the loop is supposed to do. Don't leave it to the reader to try to figure out. Most likely the loop is not needed and certainly, the find appears to be a complete waste of time.
I would also strongly recommend against having variables that only differ by the casing of one letter. Having both Id and id is asking for troubles. At one point, you'll write one when you meant to write the other. I would recommend longer variable names, you're allowed to use as many letters as you want so use full words.
In any case, fetch returns a table by default. A table is by far easier to use than separate matrices so keep the table. There's absolutely no reason to waste time splitting the table.
"If there is a possibility to keep the order of the database in matlab with using the where clauses"
This part has nothing to do with matlab. The query is executed by sqlite and the order is determined by sqlite. Matlab receives the data in whichever order sqlite sends it in. Now, you could probably modify your query (using ORDER BY) to return the data in a specific order but again, this is purely a SQL problem not a matlab one.
