The ANY keyword

Use the keyword ANY (or its synonym SOME) before a subquery to determine whether a comparison is true for at least one of the values returned. If the subquery returns no values, the search condition is false. (Because no values exist, the condition cannot be true for one of them.)

The following query finds the order number of all orders that contain an item for which the total price is greater than the total price of any one of the items in order number 1005.
Figure 1: Query
SELECT DISTINCT order_num
   FROM items
   WHERE total_price > ANY
      (SELECT total_price 
         FROM items
         WHERE order_num = 1005);
Figure 2: Query result
order_num 

       1001
       1002
       1003
       1004
       ;
       1020
       1021
       1022
       1023