SQL Select Query Need For Following Criteria. Please Help, Retrieve Records With Independent Price And Its Total Volume Per Min

Jul 17, 2006

Time       Price   Volume
090048       510      6749
090122       510      2101
090135       510      1000
090204       505      2840
090213       505      220
090222       505      1260
090232       505      850
090242       505      200
090253       510      1200
090313       510      570
090343       510      250
090353       510      160
 
Criteria
Retrieve records with independent price and its total volume per minute
 
SELECT SUBSTRING(st,1,4) AS Ttime,d_price AS Price,SUM(l_cum) AS Volume FROM cmd4
WHERE sd='20060717' AND serial='0455'
GROUP BY SUBSTRING(st,1,4),d_price,l_cum
 
Result of the above query: -
Time  Price Volume                 
0900    510     6749
0901    510     1000
0901    510     2101
0902    505     200
0902    505     220
0902    505     850
0902    505    1260
0902    505    2840
0902    510    1200
0903    510    160
0903    510    250
0903    510    570
 
 
THE FOLLOWING RESULT STILL NOT A TOTAL FOR A MINUTE]
E.G
 
0901    510            1000
             +
0901    510            2101
            =         
0901    510            3101 <- I NEED THIS
 
Can any one advice or give me tips over this. Please
 

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Inflated Number Of Records Returned When Adding Bit Field Criteria

Jul 20, 2005

When querying a bit field, I am encountering a problem with MS SQLServer returning a larger number of records for a table than theactual number of records that exist within that table.For example, my customer table has 1 million unique records, so theresults of the following query are as such:select count(customer_nbr) from customer = 1,000,000There is bit field in the customer table that denotes whether acustomer has placed an order with us called. That flag is calledorder_flagIf I run the following query:select count(customer_nbr) from customer where order_flag = 1The result is 3,000,000 records.There is no logical way that this is possible, as my table onlycontains 1,000,000 unique records and the number of customers with anorder should be a subset of this.If a run the above query with a distinct before customer number, I getthe results I want:select count(distinct customer_nbr) from customer where order_flag = 1600,000 records.So while I can get to the answer I want, I have no idea why I amreturning incorrect values if I don't select distinct.Can anyone help? I checked microsoft support and message boards buthaven't seen anything.I should note that the bit field is indexed.I am not sure if that isthe problem or not.

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