How to generate auto increment field in select query

Question

For example I have a table with 2 columns, first_name and last_name with these values

Ali           Khani
Elizabette    Amini
Britn         


        

Answer 1

If it is MySql you can try

SELECT @n := @n + 1 n,
       first_name, 
       last_name
  FROM table1, (SELECT @n := 0) m
 ORDER BY first_name, last_name

SQLFiddle

And for SQLServer

SELECT row_number() OVER (ORDER BY first_name, last_name) n,
       first_name, 
       last_name 
  FROM table1 

SQLFiddle