IF NOT EXISTS (SELECT * FROM SYSCOLUMNS INNER JOIN SYSOBJECTS ON SYSOBJECTS.id = SYSCOLUMNS.id 
               WHERE SYSCOLUMNS.NAME = 'EKLENENHMUAYENEID' AND SYSOBJECTS.name = 'HASILAR')
ALTER TABLE [dbo].[HASILAR] ADD
	[EKLENENHMUAYENEID] [int] NULL
GO