Question

Example:

there are 3 different number values:

1
2
3

I delete the 2 leaving myself with 1 and 3. How do I change the numbers so that the 3 becomes 2?

1 3 -> 1 2

Keep in mind that I have many numbers so I would like to change them all at once and not one by one. That would take alot of time. Thank you!

Answer 1

If they are simple position codes and you wanted to you could do

delete from mytable where position=2
update mytable set position=position-1 where position>2

If they are id’s for something, then this would be bad, as you would do a LOT of updates for potentially related tables.