DELETE T1 FROM [dbo].[GEBOS_Employee_Account] T1 
INNER JOIN [temp].[GEBOS_Employee_Account] T2 
ON T1.[PersNr] = T2.[PersNr] 
AND T1.[Day] = T2.[Day] 
AND T1.[AccountNr] = T2.[AccountNr] 
GO

INSERT INTO [dbo].[GEBOS_Employee_Account]
SELECT T1.* FROM [temp].[GEBOS_Employee_Account] T1
GO
