Is it possible to use calculated fields in aggregated fields?

Posted by Jørn E. Angeltveit on Stack Overflow See other posts from Stack Overflow or by Jørn E. Angeltveit
Published on 2010-05-12T23:27:33Z Indexed on 2010/05/12 23:34 UTC
Read the original article Hit count: 326

Filed under:

delphi

|

tclientdataset

Is it possible to use a calculated field in an aggregated field in a TClientDataSet?

  object cdsOrders: TClientDataSet
    AggregatesActive = True

    object cdsOrdersPrice : TIntegerField
      FieldName = 'Price'
    end
    object cdsOrdersCount: : TIntegerField
      FieldName = 'Count'
    end

    object cdsOrdersCalcTotal: TIntegerField
      FieldKind = fkInternalCalc
      FieldName = 'CalcTotal'
      Calculated = True
    end

    object cdsOrdersAggGrandTotal: TAggregateField
      FieldName = 'AggGrandTotal'
      Active = True
      Expression = 'SUM(CalcTotal)'
    end

  end

© Stack Overflow or respective owner

Related posts about delphi

TVirtualStringTree compatibility between Delphi 7 and Delphi 2010 - 'Parameter lists differ'

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I've made a form containing a TVirtualStringTree that works in Delphi 7 and Delphi 2010. I notice that as I move between the two platforms I get the message '...parameter list differ..' on the tree events and that the string type is changing bewteen TWideString (D7) and string (D2010). The only… >>> More
Convert Delphi 7 code to work with Delphi 2009

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a String that I needed access to the first character of, so I used stringname[1]. With the unicode support this no longer works. I get an error: [DCC Error] sndkey32.pas(420): E2010 Incompatible types: 'Char' and 'AnsiChar' Example code: //vkKeyScan from the windows unit var KeyString:… >>> More
Book recommendation for moving from Delphi 6 to Delphi 2010

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, I am a long time Delphi 6 developer. Looking for a book on Delphi 2010. Not only on the new features available in Delphi 2010, but more importantly, guideline on how different it is to develop applications in Delphi 2010, the architecture, standard and convention, etc. Thanks a lot. >>> More
Compile Delphi component package (bpl) for different Delphi versions

as seen on Stack Overflow - Search for 'Stack Overflow'
Hello. The situation is the following. Typically I use RAD Studio 2010 for Delphi development. I have some components I would like to redistribute in binary form (*.bpl without source). But I would like people to be able to use them despite of their Delphi version. But, for example, dcu files can… >>> More
Delphi Speech recognition delphi

as seen on Stack Overflow - Search for 'Stack Overflow'
I need create a programatic equivalent using delphi language... or could someone post a link on how to do grammars in peech recogniton using the delphi. sorry for my english... XML Grammar Sample(s): <GRAMMAR>  <RULE NAME="HelloWorld"… >>> More

Related posts about tclientdataset

tclientdataset's delta property

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, do any one know the how to clear the data in the delta of the TclientDataSet explicitly? without using applyupdates thanks in advance, Vijay. >>> More
Handling update errors in multiple records in the TClientDataset's ReconcileError method

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm trying to use the ReconcileError event to allow the user to correct the data after an update error which occurred in a specific record among others. Example: I have a dataset with one field and 3 records, this field have a unique constraint on the database, then I change one value to conflict… >>> More
Trapping errors in TClientDataSet.CommandText

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a TClientDataSet connected to a TDataSetProvider, which in turn is connected to a TAdsTable. I set the SQL command and then open the ClientDataset something like this: try CDS.CommandText := 'SELECT * FROM tablename WHERE fieldname = 1'; CDS.Open except // trap exception here - this… >>> More
to track the modified rows and manually update from the TClientDataSet's Delta

as seen on Stack Overflow - Search for 'Stack Overflow'
hi, Is there any way to manually track the changes done to a clientdataset's delta and update the changes manually on to then db. i have dynamically created a clientdataset and with out a provider i am able to load it with a tquery, now user will do some insert update and delete operations on the… >>> More
Is it possible to use calculated fields in aggregated fields?

as seen on Stack Overflow - Search for 'Stack Overflow'
Is it possible to use a calculated field in an aggregated field in a TClientDataSet? object cdsOrders: TClientDataSet AggregatesActive = True object cdsOrdersPrice : TIntegerField FieldName = 'Price' end object cdsOrdersCount: : TIntegerField FieldName = 'Count' … >>> More