SQL Server Add Default To Existing Table

–String Value ALTER TABLE [Table1] ADD CONSTRAINT [Table1_Column1] DEFAULT (‘Not Applicable’) FOR [Column1] GO –Numeric Value ALTER TABLE [Table1] ADD CONSTRAINT [Table1_Column1] DEFAULT ((0)) FOR [Column1] GO –Date Value ALTER TABLE [Table1] ADD CONSTRAINT [Table1_Column1] DEFAULT (((1)/(1))/(1900)) FOR [Column1] GO