Comentários SQL em Criar Tabela no SQL Server 2008

/*==============================================================*/
/* Table: TABLE_1                                               */
/*==============================================================*/
create table TABLE_1 (
   ID                   int                  identity,
   COLUMN_1             varchar(10)          null,
   COLUMN_2             varchar(10)          null,
   constraint PK_TABLE_1 primary key nonclustered (ID)
)
go

declare @CurrentUser sysname
select @CurrentUser = user_name()
execute sp_addextendedproperty 'MS_Description', 
   'This is my table comment',
   'user', @CurrentUser, 'table', 'TABLE_1'
go

declare @CurrentUser sysname
select @CurrentUser = user_name()
execute sp_addextendedproperty 'MS_Description', 
   'This is the primary key comment',
   'user', @CurrentUser, 'table', 'TABLE_1', 'column', 'ID'
go

declare @CurrentUser sysname
select @CurrentUser = user_name()
execute sp_addextendedproperty 'MS_Description', 
   'This is column one comment',
   'user', @CurrentUser, 'table', 'TABLE_1', 'column', 'COLUMN_1'
go

declare @CurrentUser sysname
select @CurrentUser = user_name()
execute sp_addextendedproperty 'MS_Description', 
   'This is column 2 comment',
   'user', @CurrentUser, 'table', 'TABLE_1', 'column', 'COLUMN_2'
go