IF NOT EXISTS (SELECT * FROM SYSCOLUMNS INNER JOIN SYSOBJECTS ON SYSOBJECTS.id = SYSCOLUMNS.id 
              WHERE SYSCOLUMNS.NAME = 'MATERYALNO' AND SYSOBJECTS.name = 'HTETKIKKART')
ALTER TABLE dbo.[HTETKIKKART] ADD [MATERYALNO] [nvarchar](20) NULL
go
