GROUP BY with multiple columns.

I have little query about GROUP BY clause.
Sometimes we will give multiple column names in GROUP BY .If it behaves in the same way as ORDER BY (multiple columns) i would love to have an example where I can use GROUP BY multiple columns. Anyways howsoever it behaves it will be really appreciated if anyone can explain a scenario where GROUP BY with multiple columns can be used.
I know about the usage of aggregate functions with GROUP BY but using only one column.
Thanks..!!!

Hi,
Group by is used for grouping of same records. check this bellow scenario
SELECT registrationid, dateofbirth, age FROM prawin62 WHERE registrationid = 22;
22     1/23/1975     54
22     5/18/2011     66
22     5/18/2011     66
22     5/18/2011     66
22     5/18/2011     66
22     5/18/2011     66SELECT registrationid, sum(age) FROM prawin62 WHERE registrationid = 22 GROUP BY registrationid;
22     384SELECT registrationid, dateofbirth, sum(age) FROM prawin62 WHERE registrationid = 22 GROUP BY registrationid, dateofbirth ;
22     5/18/2011     330
22     1/23/1975     54Thanks,
Praveen

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    %

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    Hi friends,
    I got a table with the columns in the form of:
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    CRITERIA_B,
    CRITERIA_C,
    AMOUNT_A,
    AMOUNT_B,
    AMOUNT_C,
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    Sum of Amount_A
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    Sum of Amount_D
    Sum of Amount_A
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    Sum of Amount_D
    Sum of Amount_A
    Sum of Amount_B
    Sum of Amount_C
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    Criteria_B3
    94
    107
    36
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    84
    132
    41
    176
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    16
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    38
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    14
    66
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    70
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    CRITERIA_C,
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    SUM(CASE WHEN CRITERIA_A = 'Critera_A1' THEN AMOUNT_B ELSE 0 END) AS CRITERIA_A1_AMOUNT_B,
    SUM(CASE WHEN CRITERIA_A = 'Critera_A1' THEN AMOUNT_C ELSE 0 END) AS CRITERIA_A1_AMOUNT_C,
    SUM(CASE WHEN CRITERIA_A = 'Critera_A2' THEN AMOUNT_A ELSE 0 END) AS CRITERIA_A2_AMOUNT_A,
    SUM(CASE WHEN CRITERIA_A = 'Critera_A2' THEN AMOUNT_B ELSE 0 END) AS CRITERIA_A2_AMOUNT_B,
    SUM(CASE WHEN CRITERIA_A = 'Critera_A2' THEN AMOUNT_C ELSE 0 END) AS CRITERIA_A2_AMOUNT_C,
    SUM(CASE WHEN CRITERIA_A = 'Critera_AN' THEN AMOUNT_A ELSE 0 END) AS CRITERIA_AN_AMOUNT_A,
    SUM(CASE WHEN CRITERIA_A = 'Critera_AN' THEN AMOUNT_B ELSE 0 END) AS CRITERIA_AN_AMOUNT_B,
    SUM(CASE WHEN CRITERIA_A = 'Critera_AN' THEN AMOUNT_C ELSE 0 END) AS CRITERIA_AN_AMOUNT_C,
    FROM Table
    GROUP BY CRITERIA_B,
    CRITERIA_C
    to make it dynamic see
    http://beyondrelational.com/modules/2/blogs/70/posts/10791/dynamic-crosstab-with-multiple-pivot-columns.aspx
    However it would be much easier to build this in SSRS reports using matrix if you can use it.
    In that case just bring data as is
    then add a matrix to report
    Add column grouping on Criteria A and Row grouping on Criteria B and then Criteria C .
    In data portion add three columns with expressions as
    =SUM(Fields!Amount_A.Value)
    =SUM(Fields!Amount_B.Value)
    =SUM(Fields!Amount_C.Value)
    then you will get exact format  what you're asking for
    Please Mark This As Answer if it solved your issue
    Please Vote This As Helpful if it helps to solve your issue
    Visakh
    My Wiki User Page
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    MS

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    22  )
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    01-Jan-1999 00:00:00          PRESS_RELEASE           4             3
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    01-Jan-1996 00:00:00          DIRECT_MAIL             3             3
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