I'm having a really hard time selecting rows from a table in one SELECT
statement. I can do it in two SELECTS, but it seems I should be able to
do it in one.
TRIPS
id date person_id cost
---------------------------------------------------------------
1 2005-01-01 2 500
2 2005-01-05 1 400
3 2005-01-12 4 350
4 2005-01-15 3 175
5 2005-01-17 2 385
6 2005-01-25 2 200
7 2005-02-03 3 600
8 2005-02-08 1 580
9 2005-02-20 4 320
PERSONS
id name
-------------------------
1 john
2 jane
3 mike
4 mary
5 henry
Okay, I want to select from Trips the most recent trip for each person.
As you can see, some of the Persons have travelled more than once, but
I only want the last trip each one made. Also, not everyone in Persons
has made a trip (Henry).
Here's the output I'm looking for:
2005-02-20 4 320 mary
2005-02-08 1 580 john
2005-02-03 3 600 mike
2005-01-25 2 200 jane
I've written and re-written my SELECT queries numerous times, but
can't seem to retrieve just one, most-recent trip/person. Any ideas?
...Rene
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