Sql – Reporting Services 2005 Subtract 2 Values in a Table

asp.netreporting-servicesreportingservices-2005sql server

I have a list of fees being displayed in a table object. I would like to display the difference between 2 of the fees in a text box (not sure if this goes in the table footer or in a group footer). I am able to sum values easy but I don't see how I can subtract values. In this example let's say I would like to show the difference of the License fee and Registration fee (999-333). How can I do this using groups / filters etc? BTW I want to do this at the report level not in a stored procedure! Thanks in advance…

This is what the data out put looks like:

FeeDescription    FeeValue
License           $999.00 
Registration      $333.00 
Inspection        $444.00 
Title             $555.00 
Tire Fee          $5.00 
Battery Fee       $1.50 
MVWEA (Lemon Law) $2.00

Best Answer

I'm guessing you're using a table. So you can do the calculation with an expression in the relevant cell's Value property. For an item-level row: =Fields!License.Value - Fields!Registration.Value. For a group-level row: =sum(Fields!License.Value - Fields!Registration.Value).

Syntax:

ALTER TABLE {TABLENAME} 
ADD {COLUMNNAME} {TYPE} {NULL|NOT NULL} 
CONSTRAINT {CONSTRAINT_NAME} DEFAULT {DEFAULT_VALUE}
WITH VALUES

Example:

ALTER TABLE SomeTable
        ADD SomeCol Bit NULL --Or NOT NULL.
 CONSTRAINT D_SomeTable_SomeCol --When Omitted a Default-Constraint Name is autogenerated.
    DEFAULT (0)--Optional Default-Constraint.
WITH VALUES --Add if Column is Nullable and you want the Default Value for Existing Records.

Notes:

Optional Constraint Name:
If you leave out CONSTRAINT D_SomeTable_SomeCol then SQL Server will autogenerate
a Default-Contraint with a funny Name like: DF__SomeTa__SomeC__4FB7FEF6

Optional With-Values Statement:
The WITH VALUES is only needed when your Column is Nullable
and you want the Default Value used for Existing Records.
If your Column is NOT NULL, then it will automatically use the Default Value
for all Existing Records, whether you specify WITH VALUES or not.

How Inserts work with a Default-Constraint:
If you insert a Record into SomeTable and do not Specify SomeCol's value, then it will Default to 0.
If you insert a Record and Specify SomeCol's value as NULL (and your column allows nulls),
then the Default-Constraint will not be used and NULL will be inserted as the Value.

Notes were based on everyone's great feedback below.
Special Thanks to:
@Yatrix, @WalterStabosz, @YahooSerious, and @StackMan for their Comments.

Sql-server – How to check if a column exists in a SQL Server table

SQL Server 2005 onwards:

IF EXISTS(SELECT 1 FROM sys.columns 
          WHERE Name = N'columnName'
          AND Object_ID = Object_ID(N'schemaName.tableName'))
BEGIN
    -- Column Exists
END

Martin Smith's version is shorter:

IF COL_LENGTH('schemaName.tableName', 'columnName') IS NOT NULL
BEGIN
    -- Column Exists
END

Best Answer

Related Solutions

Sql – Add a column with a default value to an existing table in SQL Server

Syntax:

Example:

Notes:

Sql-server – How to check if a column exists in a SQL Server table

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