IF NOT EXISTS(SELECT * FROM sys.columns WHERE object_id = OBJECT_ID(N'[dbo].[CSAPP_SUPPORT_MAIL]')
AND name = 'type')
ALTER TABLE CSAPP_SUPPORT_MAIL ADD [type] varchar(255) NULL

IF NOT EXISTS(SELECT * FROM sys.columns WHERE object_id = OBJECT_ID(N'[dbo].[KUNDEN]')
AND name = 'APP_NEWS')
ALTER TABLE KUNDEN ADD APP_NEWS bit NULL

IF NOT EXISTS(SELECT * FROM sys.columns WHERE object_id = OBJECT_ID(N'[dbo].[CSAPP_NEWS]')
AND name = 'version')
ALTER TABLE CSAPP_NEWS ADD version varchar(255) NULL