ms access get sum from derived field on forms -


i have derived field in subform calculates sum. on main form calculate sum of records of derived field. how this? below subform calculation.

  =dsum("value","lineitems","jobno = " & [jobno])

in main form have tried:

  =sum([jobvalue])

jobvalue name of derived filed in subform.

i have tried put calculation in main form reading this, not work.

=sum(dsum("value","lineitems","jobno = " & [jobno])) =sum(dsum("value","lineitems","jobno = " & [frmjobs].[form]![jobnofield]))


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