automatical calculation of a field value

Hi All,
I have a table "AggregatedSales" which has a column called
"AggregatedSales.YearSum".
This column should contain a sum which can be derived directly from another
table called "Sales" by summing up all values of "Sales.Price" WHERE
"Sales.Year" = 2005.
Is it possible to have MS SQL Server automatically calculate the value for
"AggregatedSales.YearSum" when a new data record is inserted? I would like
to add a formula to the column "AggregatedSales.YearSum" that calculates the
value for this field depending on a SELECT-Statement with a SUM() - is that
or such like possible?
Any hints are highly appreciated!
Cheers, JanYou may want to store this separately via an indexed view.
Tom
----
Thomas A. Moreau, BSc, PhD, MCSE, MCDBA
SQL Server MVP
Columnist, SQL Server Professional
Toronto, ON Canada
www.pinpub.com
"Jan Rsner" <jan.roesner@.web.de> wrote in message
news:etFXka45FHA.4012@.TK2MSFTNGP14.phx.gbl...
> Hi All,
> I have a table "AggregatedSales" which has a column called
> "AggregatedSales.YearSum".
> This column should contain a sum which can be derived directly from
> another table called "Sales" by summing up all values of "Sales.Price"
> WHERE "Sales.Year" = 2005.
> Is it possible to have MS SQL Server automatically calculate the value for
> "AggregatedSales.YearSum" when a new data record is inserted? I would like
> to add a formula to the column "AggregatedSales.YearSum" that calculates
> the value for this field depending on a SELECT-Statement with a SUM() - is
> that or such like possible?
> Any hints are highly appreciated!
> Cheers, Jan
>

automatical calculation of a field value

Hi All,
I have a table "AggregatedSales" which has a column called
"AggregatedSales.YearSum".
This column should contain a sum which can be derived directly from another
table called "Sales" by summing up all values of "Sales.Price" WHERE
"Sales.Year" = 2005.
Is it possible to have MS SQL Server automatically calculate the value for
"AggregatedSales.YearSum" when a new data record is inserted? I would like
to add a formula to the column "AggregatedSales.YearSum" that calculates the
value for this field depending on a SELECT-Statement with a SUM() - is that
or such like possible?
Any hints are highly appreciated!
Cheers, Jan
You may want to store this separately via an indexed view.
Tom
Thomas A. Moreau, BSc, PhD, MCSE, MCDBA
SQL Server MVP
Columnist, SQL Server Professional
Toronto, ON Canada
www.pinpub.com
"Jan Rsner" <jan.roesner@.web.de> wrote in message
news:etFXka45FHA.4012@.TK2MSFTNGP14.phx.gbl...
> Hi All,
> I have a table "AggregatedSales" which has a column called
> "AggregatedSales.YearSum".
> This column should contain a sum which can be derived directly from
> another table called "Sales" by summing up all values of "Sales.Price"
> WHERE "Sales.Year" = 2005.
> Is it possible to have MS SQL Server automatically calculate the value for
> "AggregatedSales.YearSum" when a new data record is inserted? I would like
> to add a formula to the column "AggregatedSales.YearSum" that calculates
> the value for this field depending on a SELECT-Statement with a SUM() - is
> that or such like possible?
> Any hints are highly appreciated!
> Cheers, Jan
>
sql

automatical calculation of a field value

Hi All,
I have a table "AggregatedSales" which has a column called
"AggregatedSales.YearSum".
This column should contain a sum which can be derived directly from another
table called "Sales" by summing up all values of "Sales.Price" WHERE
"Sales.Year" = 2005.
Is it possible to have MS SQL Server automatically calculate the value for
"AggregatedSales.YearSum" when a new data record is inserted? I would like
to add a formula to the column "AggregatedSales.YearSum" that calculates the
value for this field depending on a SELECT-Statement with a SUM() - is that
or such like possible?
Any hints are highly appreciated!
Cheers, JanYou may want to store this separately via an indexed view.
--
Tom
----
Thomas A. Moreau, BSc, PhD, MCSE, MCDBA
SQL Server MVP
Columnist, SQL Server Professional
Toronto, ON Canada
www.pinpub.com
"Jan Rösner" <jan.roesner@.web.de> wrote in message
news:etFXka45FHA.4012@.TK2MSFTNGP14.phx.gbl...
> Hi All,
> I have a table "AggregatedSales" which has a column called
> "AggregatedSales.YearSum".
> This column should contain a sum which can be derived directly from
> another table called "Sales" by summing up all values of "Sales.Price"
> WHERE "Sales.Year" = 2005.
> Is it possible to have MS SQL Server automatically calculate the value for
> "AggregatedSales.YearSum" when a new data record is inserted? I would like
> to add a formula to the column "AggregatedSales.YearSum" that calculates
> the value for this field depending on a SELECT-Statement with a SUM() - is
> that or such like possible?
> Any hints are highly appreciated!
> Cheers, Jan
>

automagical calculation of a field value

Hi All,
I have a table "AggregatedSales" which has a column called
"AggregatedSales.YearSum".
This column should contain a sum which can be derived directly from another
table called "Sales" by summing up all values of "Sales.Price" WHERE
"Sales.Year" = 2005.
Is it possible to have MS SQL Server automatically calculate the value for
"AggregatedSales.YearSum" when a new data record is inserted? I would like
to add a formula to the column "AggregatedSales.YearSum" that calculates the
value for this field depending on a SELECT-Statement with a SUM() - is that
or such like possible?
Any hints are highly appreciated!
Cheers, JanHi
You will need to do this though a trigger on the table where the insert gets
done.
Regards
--
Mike Epprecht, Microsoft SQL Server MVP
Zurich, Switzerland
IM: mike@.epprecht.net
MVP Program: http://www.microsoft.com/mvp
Blog: http://www.msmvps.com/epprecht/
"Jan Rsner" <jan.roesner@.web.de> wrote in message
news:egvP8h45FHA.2984@.TK2MSFTNGP14.phx.gbl...
> Hi All,
> I have a table "AggregatedSales" which has a column called
> "AggregatedSales.YearSum".
> This column should contain a sum which can be derived directly from
> another
> table called "Sales" by summing up all values of "Sales.Price" WHERE
> "Sales.Year" = 2005.
> Is it possible to have MS SQL Server automatically calculate the value for
> "AggregatedSales.YearSum" when a new data record is inserted? I would like
> to add a formula to the column "AggregatedSales.YearSum" that calculates
> the
> value for this field depending on a SELECT-Statement with a SUM() - is
> that
> or such like possible?
> Any hints are highly appreciated!
> Cheers, Jan
>|||Hi Jan
You may possibly want to consider using a view for AggregatedSales!
John
"Jan R?sner" wrote:

> Hi All,
> I have a table "AggregatedSales" which has a column called
> "AggregatedSales.YearSum".
> This column should contain a sum which can be derived directly from anothe
r
> table called "Sales" by summing up all values of "Sales.Price" WHERE
> "Sales.Year" = 2005.
> Is it possible to have MS SQL Server automatically calculate the value for
> "AggregatedSales.YearSum" when a new data record is inserted? I would like
> to add a formula to the column "AggregatedSales.YearSum" that calculates t
he
> value for this field depending on a SELECT-Statement with a SUM() - is tha
t
> or such like possible?
> Any hints are highly appreciated!
> Cheers, Jan
>
>|||"Jan Rsner" <jan.roesner@.web.de> wrote in message
news:egvP8h45FHA.2984@.TK2MSFTNGP14.phx.gbl...
> Hi All,
> I have a table "AggregatedSales" which has a column called
> "AggregatedSales.YearSum".
> This column should contain a sum which can be derived directly from
> another
> table called "Sales" by summing up all values of "Sales.Price" WHERE
> "Sales.Year" = 2005.
> Is it possible to have MS SQL Server automatically calculate the value for
> "AggregatedSales.YearSum" when a new data record is inserted? I would like
> to add a formula to the column "AggregatedSales.YearSum" that calculates
> the
> value for this field depending on a SELECT-Statement with a SUM() - is
> that
> or such like possible?
> Any hints are highly appreciated!
> Cheers, Jan
>
Create a view rather than a summary table. You can consider making it an
indexed view. You should avoid storing calculated results whenever possible.
David Portas
SQL Server MVP
--