IF NOT EXISTS (SELECT * FROM SYSCOLUMNS INNER JOIN SYSOBJECTS ON SYSOBJECTS.id = SYSCOLUMNS.id 
               WHERE SYSCOLUMNS.NAME = 'LINKMI' AND SYSOBJECTS.name = 'HTETKIKDOKUMAN')
ALTER TABLE dbo.HTETKIKDOKUMAN ADD
	LINKMI [bit] NOT NULL DEFAULT ((0))
GO