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08.12.2008 at 12:40PM PDT, ID: 23642496
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8.6

How do I group more than one field in a subquery?

Asked by VieleFragen in SQL Query Syntax, DB2 Database

Tags: , ,

My understanding of subqueries is that I can only match on one field from my main query.  For the project I have now, I want to group one way so that I get the earliest timestamp for a particular rate number, but I need to list the user who created that record.  The rate history table could (and does) have multiple users who adjusted the rate later, so when I group I need to include the user profile field in the GROUP BY clause.  However, I don't want to see the earliest timestamp for each user.

I have included two SQL's and results in the attached code snippet, but am stymied as to how I should combine them.
1) I haven't figured out a way to join the table to itself with a different grouping in each "dataset".
2) Union or intersect requires that both queries have the same structure, which means I have more than I need in the SELECT clause.  But I need a very general GROUP BY clause, and the fields in the SELECT and GROUP BY clauses need to look very similar (except for fields which are aggregated, like MIN()).
3) I haven't had any luck using a subquery using "where [rate number] in" in the main query and "select [rate number]" in the subquery.  I need to match on the minimum timestamp as well.

Is this possible without building a work table with one SQL and then querying that with a second SQL?

Thanks, AlanStart Free Trial 
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SQL 1
select main.DGVLSTPRF, main.DGVDRMSCA, main.DGVDRRNBR, main.DGVSPOCTY, main.DGVSPOSTE, main.DGVSPDCTY, main.DGVSPDSTE,
    min(main.DGVHSTDTM)
    from prodlib.DRADGVHP main, prodlib.DRADGVHP mindtm
    where main.DGVTOTAMT <> 0
    and main.DGVDRRNBR in (14266989, 14266990)
    and main.DGVDRRNBR = mindtm.DGVDRRNBR
    group by main.DGVLSTPRF, main.DGVDRMSCA, main.DGVDRRNBR, main.DGVSPOCTY, main.DGVSPOSTE, main.DGVSPDCTY, main.DGVSPDSTE
    order by main.DGVDRRNBR, main.DGVHSTDTM
 
RESULT1
DGVLSTPRF  DGVDRMSCA DGVDRRNBR   DGVSPOCTY            DGVSPOSTE DGVSPDCTY            DGVSPDSTE 00008                      
---------- --------- ----------- -------------------- --------- -------------------- --------- -------------------------- 
ILSALGADE  MNDY      14266989    PARIS                TX        HASLET               TX        2008-07-15 11:37:04.651000 
ILBERENYD  MNDY      14266989    PARIS                TX        HASLET               TX        2008-07-15 11:46:47.901000 
ILRADLOFA  COTM      14266990    PATASKALA            OH        FRANKLIN PARK        IL        2008-07-15 11:38:08.091000 
ILBERENYD  COTM      14266990    PATASKALA            OH        FRANKLIN PARK        IL        2008-07-15 13:02:43.635000 
 
4 Row(s) affected
 
 
SQL2
    select mindtm.DGVDRRNBR, min(mindtm.DGVHSTDTM)
        from prodlib.DRADGVHP mindtm
        where mindtm.DGVTOTAMT <> 0
        and mindtm.DGVDRRNBR in (14266989, 14266990)
        group by mindtm.DGVDRRNBR
 
RESULT2
DGVDRRNBR   00002                      
----------- -------------------------- 
14266989    2008-07-15 11:37:04.651000 
14266990    2008-07-15 11:38:08.091000 
 
2 Row(s) affected
 
Keywords: How do I group more than one field in a…
Title
1 order by in subquery
2 Subquery?
3 SubQuery
4 Will this correlated subquery run corre…
5 Complex subqueries
6 nested subquery in a correlated subqu…
 
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[+][-]08.12.2008 at 12:48PM PDT, ID: 22216461

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[+][-]08.12.2008 at 01:55PM PDT, ID: 22217027

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About this solution

Zones: SQL Query Syntax, DB2 Database
Tags: IBM, DB2/400 SQL, 5.04.00014 V5R4M00014
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Solution Provided By: folderol
Participating Experts: 2
Solution Grade: A
 
 
[+][-]08.13.2008 at 08:27AM PDT, ID: 22222621

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