How to close sequence gaps in SQL Server?

Question

Let\'s say I have a Turtle table. When I run

SELECT * FROM Turtle ORDER BY Sort

I get this:

Id | Name | Sort
2    Leo    1
3           


        

Answer 1

This is what they mean by using a cte in an update.

;WITH cte AS 
(
    SELECT *, ROW_NUMBER() OVER(ORDER BY Sort) NewSort 
    FROM Turtle
)
UPDATE cte SET Sort = NewSort