ORDER BY 排序
    根据指定列对结果集排序
    ASC ascend 升序（默认）
    DESC descend 降序

    1. SELECT Column1, column2, ... 
    2. FROM table 
    3. WHERE condition(s) 
    4. ORDER BY column1 ASC/DESC,column2 ASC/DESC

    如果一列升序，一列降序

    1. SELECT *
    2. FROM movies
    3. ORDER BY director ASC, year DESC