James B. Byrne wrote:
On Tue, May 19, 2009 16:41, Andy Colson wrote:
If your query above is getting you mostly what you want, just use it
as a derived table.
I lack the experience to understand what this means.
If, as you suggest, I use a subquery as the expression to the main
SELECT and for it I use the syntax that returns every distinct
combination of base, quote, timestamp, and type, then what?
Unless I am missing something then I still have too many rows for
those currencies with more than one type.
I was not offering a specific answer, just another tool you could use to
massage the data more. What I'm saying is, with that first query you
got the data into a new format.... Think of that result set as a table
itself.
As if you had done:
create table tmp (lots of field);
insert into tmp select (that big query you first posted)
now can you select from tmp to get your answer? Once again, I may be
leading you down the wrong path, and as I said before I don't know your
data/layouts, and I didn't study your sql very much.
-Andy
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