IF NOT EXISTS (SELECT * FROM SYSCOLUMNS INNER JOIN SYSOBJECTS ON SYSOBJECTS.id = SYSCOLUMNS.id 
              WHERE SYSCOLUMNS.NAME = 'REDNUMUNEVAR' AND SYSOBJECTS.name = 'HTETKIKKART')
ALTER TABLE dbo.[HTETKIKKART] ADD [REDNUMUNEVAR] bit NULL
go
