>I'm gaving a problem with adding several sums together when using a
>group by clause. The table I have looks like this:
>
>school_id int
>school_name varchar
>sport varchar
>cost_a float(9,2)
>cost_b float(9,2)
>cost_c float(9,2)
>
>The real table is normalized, figured it would make for a simpler
>example this way, so you don't have to tell me ;) Each school has
>records for several diffrent sports I'm trying to query for the
>total amount spent for each school with the following query.
>
>SELECT
>school_name,
>(sum(cost_a)+sum(cost_b)+sum(cost_c)) as total
>FROM
>schools
>GROUP BY school
Sir, the obvious error is that "school" is not a column in your
table. Try grouping by school_id.
Bob Hall
>
>With the desired result
>
>school_1 125000.00
>school_2 234642.12
>school_3 98433.45
>
>
>But I get zero's for the total column. If I query for only one
>school I get the correct numbers:
>
>SELECT
>school,
>(sum(cost_a)+sum(cost_b)+sum(cost_c)) as total
>FROM
>schools
>WHERE
>school='myschool'
>GROUP BY school
>
>If I query for a few schools (school_id>3) sometimes I get unusual
>numbers, 17.24 for one example. I'm not sure what's happening with
>these queries so I have to ask.
>
>Am I doing the query wrong?
>Is SQL or mySQL not able to handle this query?
>Or did I find a bug in mySQL?
>
>
>--
>Jeff Bearer, RHCE
>Webmaster
>PittsburghLIVE.com
>
>
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