Question

How can I run an UPDATE like below where it only updates the columns that are not null?

UPDATE Table
   SET Name = @Name,
       Email = @Email,
       Phone = @Phone
 WHERE id = @id

Edit:

So if I’m using the above update but the following is assigned…

  @Name = Tom
  @Email = NULL
  @Phone = NULL

So only Name would be updated and whatever was in the database for Email and Phone will remain in the database as such.

Answer 1

This basic idea should work:

UPDATE Table
   SET Name = ISNULL(@Name, Name),
       Email = ISNULL(@Email, Email),
       Phone = ISNULL(@Phone, Phone)
 WHERE id = @id

So if @Name is NULL, Name is unchanged. If @Name is not NULL, it is assigned to Name etc…

— EDIT —

Sure @clintp, the COALESCE variant would look like this:

UPDATE Table
   SET Name = COALESCE(@Name, Name),
       Email = COALESCE(@Email, Email),
       Phone = COALESCE(@Phone, Phone)
 WHERE id = @id