Group by sql server

our je veux grouper par identfiant fiscal svp, 
SELECT (CASE WHEN EbpSysOptions.OptionName ='Identification.VatInfo.VATRegistrationNumber' THEN EbpSysOptions.OptionValue ELSE ' ' END) AS [Identifiant Fiscal], (CASE WHEN EbpSysOptions.OptionName ='ContactDetailsOptions.Address.Name' THEN EbpSysOptions.OptionValue ELSE ' ' END) AS [Raison sociale], (CASE WHEN EbpSysOptions.OptionName ='ContactDetailsOptions.Address.Address.Address1' THEN EbpSysOptions.OptionValue ELSE ' ' END) AS [Adresse 1], (CASE WHEN EbpSysOptions.OptionName ='ContactDetailsOptions.Address.Address.Address2' THEN EbpSysOptions.OptionValue ELSE ' ' END) AS [Adresse 2], (CASE WHEN EbpSysOptions.OptionName ='ContactDetailsOptions.Address.Address.Address3' THEN EbpSysOptions.OptionValue ELSE ' ' END) AS [Adresse 3], (CASE WHEN EbpSysOptions.OptionName ='ContactDetailsOptions.Address.Address.Address4' THEN EbpSysOptions.OptionValue ELSE ' ' END) AS [Adresse 4], (CASE WHEN EbpSysOptions.OptionName ='ContactDetailsOptions.Address.Address.Zipcode' THEN EbpSysOptions.OptionValue ELSE ' ' END) AS [Code postal], (CASE WHEN EbpSysOptions.OptionName ='ContactDetailsOptions.Address.Address.City' THEN EbpSysOptions.OptionValue ELSE ' ' END) AS [Ville], (CASE WHEN EbpSysOptions.OptionName ='ContactDetailsOptions.Address.Address.CountyIsocode' THEN EbpSysOptions.OptionValue ELSE ' ' END) AS [Pays] FROM EbpSysOptions