IF NOT EXISTS (SELECT * FROM SYSCOLUMNS INNER JOIN SYSOBJECTS ON SYSOBJECTS.id = SYSCOLUMNS.id 
              WHERE SYSCOLUMNS.NAME = 'OIPTALACIKLAMA' AND SYSOBJECTS.name = 'ODEMEISL')
ALTER TABLE dbo.[ODEMEISL] ADD OIPTALACIKLAMA NVARCHAR(150) null
go
