anchor.diff:  		{
   			//System.out.println("rows: user - age filters");
   			/* pulls user names, age filter */ 	
  -			SQL_2 ="SELECT u.id, u.name, SUM(s.quantity*s.price) AS amount"+
  -						" FROM users u LEFT JOIN sales s ON s.uid = u.id"+
  -						" WHERE u.age between " + age +  
  -						" GROUP BY u.name,u.id"+
  -						" ORDER BY u.name ASC LIMIT 21"+
  -						" OFFSET "+r_offset;
  +			SQL_2 ="SELECT user_table.id, user_table.name, SUM(s.quantity*s.price) AS amount"+
  +					" FROM (SELECT u.id, u.name"+ 
  +					" FROM users u WHERE u.age between "+age+" ORDER BY u.name ASC LIMIT 20 OFFSET " +r_offset+ ") AS user_table"+
  +					" LEFT JOIN sales s ON (s.uid = user_table.id)"+ 
  +					" GROUP BY user_table.name,user_table.id";
   			/* SQL_21 ="SELECT u.id, u.name, SUM(s.quantity*s.price) AS amount"+
   					" FROM users u LEFT JOIN sales s ON s.uid = u.id"+
   					" WHERE u.age between " + age +  
  
positive.code: 					" OFFSET "+r_offset; */
  			
  		   SQL_2 = "SELECT user_table.id, user_table.name, SUM(s.quantity*s.price) AS amount"+ 
  					" FROM (SELECT name, id FROM users u WHERE u.age between " + age + " AND u.state='"+ state +
  					" ORDER BY name ASC LIMIT 20 OFFSET "+r_offset +")"+ 
  					" AS user_table LEFT JOIN sales s"+ 
  					" ON (s.uid = user_table.id)" + 
  
negative.code: 		{
  			//System.out.println("rows: user - state filters");
  			/* pulls user names, state filter */ 	
  		    SQL_2 ="SELECT user_table.id, user_table.name, SUM(s.quantity*s.price) AS amount FROM (SELECT u.id, u.name "+
  					" FROM users u " +
  					" WHERE u.state='"+ state +"') AS user_table" + 
  					" LEFT JOIN sales s ON s.uid = user_table.id"+
  					" GROUP BY user_table.name,user_table.id"+
  					" ORDER BY user_table.name ASC LIMIT 20"+
  					" OFFSET "+r_offset;
  			/* SQL_21 ="SELECT u.id, u.name, SUM(s.quantity*s.price) AS amount"+
  					" FROM users u LEFT JOIN sales s ON s.uid = u.id"+
  