IF not EXISTS( SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'Repair' AND  COLUMN_NAME = 'TechnicianDescription')
begin
	alter table Repair add TechnicianDescription	nvarchar(1000) null
end;
IF not EXISTS( SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'Repair' AND  COLUMN_NAME = 'CustomerDescription')
begin
	alter table Repair add CustomerDescription	nvarchar(1000) null
end