Question

I have a sql table which looks like :

srno | passportnumber|flightnumber
Null | ABC123        |AI-2000
Null | ab3333        |AI-2011
Null | ab565235      |AI-2562
Null | ABC123        |AI-2025
Null | ABC123        |AI-5623
Null | XYZ12334      |AI-5625

I need a query to sort them by passportnumber so that repetitive passportnumber rpws are next to eachother and then i want to update the table to insert the serialnumber.
the result should be something like this :

1    | ABC123        |AI-2000
2    | ABC123        |AI-2025
3    | ABC123        |AI-5623
4    | ab3333        |AI-2011
5    | ab565235      |AI-2562
6    | XYZ12334      |AI-5625

Answer 1

Try this:

;WITH Ranked
AS
(
   SELECT *, ROW_NUMBER() OVER(ORDER BY passportnumber) row_num
   FROM Tablename
) 
UPDATE Ranked
SET srno = row_num;

Live Demo