text: SELECT first_name AS Company_Names FROM employee
  UNION
  SELECT branch_name FROM branch
  UNION
  SELECT client_name FROM client;
  
  
  SELECT client_name FROM client 
  UNION 
  SELECT supplier_name FROM branch_supplier
  
  SELECT client_name, branch_id FROM client UNION SELECT supplier_name, branch_id FROM branch_supplier
  
  SELECT client_name, client.branch_id FROM client UNION SELECT supplier_name, branch_supplier.branch_id FROM branch_supplier
  
  SELECT salary FROM employee UNION SELECT total_sales FROM works_with
  
  