DELETE T1 FROM [dbo].[GEBOS_Cost_Center] T1 
INNER JOIN [temp].[GEBOS_Cost_Center] T2 
ON T1.[CostCenterNr] = T2.[CostCenterNr] 
GO

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