if not exists (select name from syscolumns where name='staxrate' and id=object_id('t_whquote_body'))
  alter table t_whquote_body add staxrate int not null default(0)
go

if not exists (select name from syscolumns where name='staxrate' and id=object_id('t_whsale_body'))
  alter table t_whsale_body add staxrate int not null default(0)
go

if not exists (select name from syscolumns where name='staxrate' and id=object_id('t_whsale_body2'))
  alter table t_whsale_body2 add staxrate int not null default(0)
go

if not exists (select name from syscolumns where name='staxrate' and id=object_id('t_whreturn_body'))
  alter table t_whreturn_body add staxrate int not null default(0)
go

if not exists (select name from syscolumns where name='staxrate' and id=object_id('t_whreturn_body2'))
  alter table t_whreturn_body2 add staxrate int not null default(0)
go