How to use T-SQL to properly add new columns

Question

I am getting started with T-SQL in Visual Studios 2013 and I was wondering how can you add new columns to an existing database table?

I have this snippet

ALTER TABLE [dbo].[Articles]
ADD COLUMNS
  TenLatMin  FLOAT     NULL,
  TenLatMax  FLOAT     NULL,
  TenLonMin  FLOAT     NULL,
  TenLonMax  FLOAT     NULL;

but it complains

incorrect syntax near FLOAT

What can be wrong about the code above?

Answer 1

According to the documentation, you shouldn't have COLUMNS in there:

ALTER TABLE [dbo].[Articles]
ADD
TenLatMin  FLOAT     NULL,
TenLatMax  FLOAT     NULL,
TenLonMin  FLOAT     NULL,
TenLonMax  FLOAT     NULL;