how to increment integer Columns value by 1 in SQL

Question

My questions is

how to increment a column\'s value by 1.

For example, suppose a column ID has values 1,2,3,4, ..

Answer 1

If you want to have an unique number for each row automatically generated, this is IDENTITY as per Neil's answer.

If each time you update the table you want to increase the values (ie they are not keys):

Update MyTable
Set IDColumn = IDColumn + 1
Where