Tsql row number

SELECT 
   ROW_NUMBER() OVER (
 ORDER BY first_name
   ) row_num,
   first_name, 
   last_name, 
   city
FROM 
   sales.customers;

Source: sqlservertutorial.net

Row number mssql

        
            
        
     SELECT 
   ROW_NUMBER() OVER (
	ORDER BY first_name
   ) row_num,
   first_name, 
   last_name, 
   city
FROM 
   sales.customers;

Source: sqlservertutorial.net

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