news <[EMAIL PROTECTED]> wrote on 10/26/2005 04:02:33 PM:
> Michael Stassen wrote:
> > Daniel Bowett wrote:
> >
> >> Peter Brawley wrote:
> >>
> >>> Dan,
> >>>
> >>> />...Total sales for ever would be a simple GROUP BY query with a
> >>> >sum on the sales - but I cant see how I am going to get this info.
> >>> >Do I need to use nested queries? /
> >>>
> >>> You don't need nested queries. It's a crosstab or pivot table query.
> >>> The trick is to sum into one column per desired year, scope the sums
> >>> on month-to-date, and group by retailer, eg:
> >>>
> >>> SELECT
> >>> r.name,
> >>> SUM(IF(LEFT(month_2,4)='2004',sales, '')) AS '2004 Sales',
> >>> SUM(IF(LEFT(month_2,4)='2005',sales, '')) AS '2005 Sales'
> >>> FROM tbl_retailer AS r
> >>> INNER JOIN tbl_sales AS s USING (retailerid)
> >>> WHERE SUBSTRING(month_2,6,2)<MONTH(NOW())
> >>> GROUP BY r.name;
> >>>
> >>> PB
> >>>
> >>> -----
> >>>
> >>> Daniel Bowett wrote:
> >>>
> >>>> I am unsure how to write this query, can someone help?
> >>>>
> >>>> I have two tables.
> >>>>
> >>>> One has a list of retailers (tbl_retailer):
> >>>>
> >>>> retailerid
> >>>> name
> >>>> postcode
> >>>>
> >>>> e.g.
> >>>>
> >>>> 1 Sprocket Supplies CH23 4PY
> >>>>
> >>>> The other has the sales by month for each retailer:
> >>>>
> >>>> retailerid
> >>>> month_2 sales
> >>>>
> >>>> e.g.
> >>>>
> >>>> 1 2004-01 100
> >>>> 1 2004-02 400
> >>>> 1 2004-03 300
> >>>> 1 2004-04 200
> >>>> 1 2004-05 300
> >>>>
> >>>>
> >>>> What I need is a way to output a list of each retailer with two
> >>>> columns at the end being sales this year to date and the equivalent
> >>>> sales for the previous year.
> >>>>
> >>>> So the columns would be:
> >>>>
> >>>> name this_years_sales_to_date last_years_sales_to_date
> >>>>
> >>>> Total sales for ever would be a simple GROUP BY query with a sum on
> >>>> the sales - but I cant see how I am going to get this info. Do I
> >>>> need to use nested queries?
> >>>>
> >>>> Regards,
> >>>>
> >>>> Dan.
> >>>>
> >>>>
> >>>>
> >>>
> >>>
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> >>> Version: 7.1.361 / Virus Database: 267.12.5/149 - Release Date:
> >>> 10/25/2005
> >>>
> >>>
> >>>
> >>>
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> >>>
> >>>
> >>
> >> Thats workign great, the only problem is the WHERE clause means I
only
> >> show rows where there is sales info in the database. Sometimes there
> >> will be no sales info in there for a particular retailer - would it
be
> >> possible to show zero for these?
> >
> >
> > Yes. Change the INNER JOIN to a LEFT JOIN.
> >
> > Michael
> >
> >
>
> I tried a LEFT JOIN earlier - it still only shows rows where there is
> sales. I think it's because of the WHERE clause.
>
>
Did my previous post not work? It should have given you total sales for
all retailers (regardless of if they had sales in 2005-2005)
SELECT r.name
, sum(if(sbm.month_2 between '2004' and '2004-99',sbm.sales, 0))
as sales_2004
, sum(if(sbm.month_2 between '2005' and '2005-99',sbm.sales, 0))
as sales_2005
FROM retailers r
LEFT JOIN sales_by_month sbm
on sbm.retailerid = r.retailerid
GROUP BY r.name;
Shawn Green
Database Administrator
Unimin Corporation - Spruce Pine
