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vb.net data : Aggregating groups of rows using SQL
SELECT CUSTOMER, STOCK_CODE, SUM(QUANTITY), AVG(PRICE), MIN(DATE) FROM STOCK_TRADE GROUP BY CUSTOMER,STOCK_CODE
Dear Group,
I have a SQL coding problem, which I hope that you can help me with! I have the following SQL view, which returns a Data Table, STOCK_TRADE, with the following data.. CUSTOMER STOCK_CODE QUANTITY PRICE DATE J. BLOGGS MSFT 1000 535.50 10/05/2006 J. BLOGGS MSFT 2000 536.75 11/05/2006 J. BLOGGS GOOG 500 400.00 10/05/2006 J. BLOGGS GOOG 100 300.00 12/05/2006 H. ENFIELD MSFT 300 536.75 11/05/2006 My query is, I wish to aggregate rows which are for the same customer and stock code taking a SUM of the QUANTITY and an AVERAGE of the PRICE and the FIRST/TOP/EARLIEST of the DATE, so that the table looks like this: CUSTOMER STOCK_CODE QUANTITY PRICE DATE J. BLOGGS MSFT 3000 536.13 10/05/2006 J. BLOGGS GOOG 600 350.00 10/05/2006 H. ENFIELD MSFT 300 536.75 11/05/2006 Ultimately, I am aiming to order by STOCK_CODE in a Crystal Report to GROUP BY the STOCK_CODE and then just one line per customer for each stock that they have. Can anyone suggest the SQL - preferably without using cursors - to perform a SELECT on the STOCK_TRADE table as shown in the top example to return the aggregate Data Set in the bottom table? I am using Visual Studio 2005 (.NET) and SQL Server 2005, although generic SQL would be my preference to solve the programming task. Many thanks in advance for your time and help.
[quoted text, click to view]
<markc600@hotmail.com> wrote in message news:1147021432.247292.102430@e56g2000cwe.googlegroups.com... > > SELECT CUSTOMER, > STOCK_CODE, > SUM(QUANTITY), > AVG(PRICE), > MIN(DATE) > FROM STOCK_TRADE > GROUP BY CUSTOMER,STOCK_CODE Many thanks for that - it seems to be exactly what I'm looking for. Apologies for the double posting too; I've cancelled the second message and forgot that I posted this one. Thanks again.
SELECT [CUSTOMER], [STOCK_CODE], SUM(QUANTITY) as [QUANTITY], AVG(PRICE) as
[PRICE], MIN(DATE) as [DATE] FROM WHATEVERYOURVIEWIS GROUP BY [CUSTOMER], [STOCK_CODE] Although this is the wrong place to post this! Cheers, Greg Young MVP - C# [quoted text, click to view] "Liddle Feesh" <none> wrote in message news:445e273b$0$9257$ed2619ec@ptn-nntp-reader01.plus.net... > Dear Group, > > I have a SQL coding problem, which I hope that you can help me with! > > I have the following SQL view, which returns a Data Table, STOCK_TRADE, > with the following data.. > > CUSTOMER STOCK_CODE QUANTITY PRICE DATE > J. BLOGGS MSFT 1000 535.50 10/05/2006 > J. BLOGGS MSFT 2000 536.75 11/05/2006 > J. BLOGGS GOOG 500 400.00 10/05/2006 > J. BLOGGS GOOG 100 300.00 12/05/2006 > H. ENFIELD MSFT 300 536.75 11/05/2006 > > My query is, I wish to aggregate rows which are for the same customer and > stock code taking a SUM of the QUANTITY and an AVERAGE of the PRICE and > the FIRST/TOP/EARLIEST of the DATE, so that the table looks like this: > > CUSTOMER STOCK_CODE QUANTITY PRICE DATE > J. BLOGGS MSFT 3000 536.13 10/05/2006 > J. BLOGGS GOOG 600 350.00 10/05/2006 > H. ENFIELD MSFT 300 536.75 11/05/2006 > > Ultimately, I am aiming to order by STOCK_CODE in a Crystal Report to > GROUP BY the STOCK_CODE and then just one line per customer for each stock > that they have. > > Can anyone suggest the SQL - preferably without using cursors - to perform > a SELECT on the STOCK_TRADE table as shown in the top example to return > the aggregate Data Set in the bottom table? > > I am using Visual Studio 2005 (.NET) and SQL Server 2005, although generic > SQL would be my preference to solve the programming task. > > Many thanks in advance for your time and help. >
hmm this showed up with no replies when I first saw it :-?
[quoted text, click to view] "Greg Young" <DruckDruckGoose@hotmail.com> wrote in message news:udINwWocGHA.3388@TK2MSFTNGP05.phx.gbl... > SELECT [CUSTOMER], [STOCK_CODE], SUM(QUANTITY) as [QUANTITY], AVG(PRICE) > as [PRICE], MIN(DATE) as [DATE] FROM WHATEVERYOURVIEWIS GROUP BY > [CUSTOMER], [STOCK_CODE] > > Although this is the wrong place to post this! > > Cheers, > > Greg Young > MVP - C# > > "Liddle Feesh" <none> wrote in message > news:445e273b$0$9257$ed2619ec@ptn-nntp-reader01.plus.net... >> Dear Group, >> >> I have a SQL coding problem, which I hope that you can help me with! >> >> I have the following SQL view, which returns a Data Table, STOCK_TRADE, >> with the following data.. >> >> CUSTOMER STOCK_CODE QUANTITY PRICE DATE >> J. BLOGGS MSFT 1000 535.50 10/05/2006 >> J. BLOGGS MSFT 2000 536.75 11/05/2006 >> J. BLOGGS GOOG 500 400.00 10/05/2006 >> J. BLOGGS GOOG 100 300.00 12/05/2006 >> H. ENFIELD MSFT 300 536.75 11/05/2006 >> >> My query is, I wish to aggregate rows which are for the same customer and >> stock code taking a SUM of the QUANTITY and an AVERAGE of the PRICE and >> the FIRST/TOP/EARLIEST of the DATE, so that the table looks like this: >> >> CUSTOMER STOCK_CODE QUANTITY PRICE DATE >> J. BLOGGS MSFT 3000 536.13 10/05/2006 >> J. BLOGGS GOOG 600 350.00 10/05/2006 >> H. ENFIELD MSFT 300 536.75 11/05/2006 >> >> Ultimately, I am aiming to order by STOCK_CODE in a Crystal Report to >> GROUP BY the STOCK_CODE and then just one line per customer for each >> stock that they have. >> >> Can anyone suggest the SQL - preferably without using cursors - to >> perform a SELECT on the STOCK_TRADE table as shown in the top example to >> return the aggregate Data Set in the bottom table? >> >> I am using Visual Studio 2005 (.NET) and SQL Server 2005, although >> generic SQL would be my preference to solve the programming task. >> >> Many thanks in advance for your time and help. >> > >
Just one point...
Are you sure you want a straight average of stock price, rather than a weighted average? i.e. if 999 shares sell for $1000 each, and 1 share sells for $2, should the average be $501 or should it be $999.002? You may want something like this... SELECT CUSTOMER, STOCK_CODE, SUM(QUANTITY) as TotalQuantity, SUM(PRICE*quantity)/SUM(QUANTITY) as AvgPrice, MIN(DATE) as FirstDate FROM STOCK_TRADE GROUP BY CUSTOMER,STOCK_CODE [quoted text, click to view] "Liddle Feesh" <none> wrote in message news:445e29c0$0$9265$ed2619ec@ptn-nntp-reader01.plus.net... > <markc600@hotmail.com> wrote in message > news:1147021432.247292.102430@e56g2000cwe.googlegroups.com... > > > > SELECT CUSTOMER, > > STOCK_CODE, > > SUM(QUANTITY), > > AVG(PRICE), > > MIN(DATE) > > FROM STOCK_TRADE > > GROUP BY CUSTOMER,STOCK_CODE > > Many thanks for that - it seems to be exactly what I'm looking for. > > Apologies for the double posting too; I've cancelled the second message and > forgot that I posted this one. > > Thanks again. > >
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