Question

I have the following problem. I have a table with a few hundred thousand records, which has the following identifiers (for simplicity)

MemberID      SchemeName        BenefitID        BenefitAmount
10            ABC               1                10000
10            ABC               1                2000
10            ABC               2                5000
10            A.B.C             3                11000

What I need to do is to convert this into a single record that looks like this:

MemberID      SchemeName        B1       B2      B3        
10            ABC               12000    5000    11000     

The problem of course being that I need to differentiate by SchemeName, and for most records this won’t be a problem, but for some SchemeName wouldn’t be captured properly. Now, I don’t particularly care if the converted table uses “ABC” or “A.B.C” as scheme name, as long as it just uses 1 of them.

I’d love hear your suggestions.

Thanks
Karl

(Using SQL Server 2008)

Answer 1

based on the limited info in the original question, give this a try:

DECLARE @YourTable  table(MemberID int, SchemeName varchar(10), BenefitID int, BenefitAmount int)

INSERT INTO @YourTable VALUES (10,'ABC'  ,1,10000)
INSERT INTO @YourTable VALUES (10,'ABC'  ,1,2000)
INSERT INTO @YourTable VALUES (10,'ABC'  ,2,5000)
INSERT INTO @YourTable VALUES (10,'A.B.C',3,11000)
INSERT INTO @YourTable VALUES (11,'ABC'  ,1,10000)
INSERT INTO @YourTable VALUES (11,'ABC'  ,1,2000)
INSERT INTO @YourTable VALUES (11,'ABC'  ,2,5000)
INSERT INTO @YourTable VALUES (11,'A.B.C',3,11000)
INSERT INTO @YourTable VALUES (10,'mnp',3,11000)
INSERT INTO @YourTable VALUES (11,'mnp'  ,1,10000)
INSERT INTO @YourTable VALUES (11,'mnp'  ,1,2000)
INSERT INTO @YourTable VALUES (11,'mnp'  ,2,5000)
INSERT INTO @YourTable VALUES (11,'mnp',3,11000)

SELECT
    MemberID, REPLACE(SchemeName,'.','') AS SchemeName
        ,SUM(CASE WHEN BenefitID=1 THEN BenefitAmount ELSE 0 END) AS B1
        ,SUM(CASE WHEN BenefitID=2 THEN BenefitAmount ELSE 0 END) AS B2
        ,SUM(CASE WHEN BenefitID=3 THEN BenefitAmount ELSE 0 END) AS B3
    FROM @YourTable
    GROUP BY MemberID, REPLACE(SchemeName,'.','')
    ORDER BY MemberID, REPLACE(SchemeName,'.','')

OUTPUT:

MemberID    SchemeName  B1          B2          B3
----------- ----------- ----------- ----------- -----------
10          ABC         12000       5000        11000
10          mnp         0           0           11000
11          ABC         12000       5000        11000
11          mnp         12000       5000        11000

(4 row(s) affected)