在SQL中比較數字大小的方法是使用比較運算符，例如：
示例：
SELECT * FROM table_name WHERE column_name > 10;
SELECT * FROM table_name WHERE column_name < 20;
SELECT * FROM table_name WHERE column_name >= 15;
SELECT * FROM table_name WHERE column_name <= 30;
SELECT * FROM table_name WHERE column_name = 25;
SELECT * FROM table_name WHERE column_name != 5;
