Declare @Id Int                               
Select @Id = Id From sysobjects Where Name = 'Tbl_ClubH'
if not Exists(SELECT * FROM syscolumns WHERE id = @Id and Name = 'IsMale')
  Alter Table dbo.Tbl_ClubH Add IsMale BIT DEFAULT(1) 

Select @Id = Id From sysobjects Where Name = 'Tbl_ClubH'
if not Exists(SELECT * FROM syscolumns WHERE id = @Id and Name = 'BirthDate')
  Alter Table dbo.Tbl_ClubH Add BirthDate SMALLDATETIME
