Sort by One Column 按一列排序
SELECT Name
FROM country
ORDER BY Name
Sorting by Multipe Cloumns 多列排序
SELECT Continent, Region, Name
FROM country
ORDER BY Continent, Region, Name
Sorting by Column Position 按列位置排序
SELECT Code, Region, Name
FROM country
ORDER BY 2, 3
Specifying Sort Direction 指定排序方向
SELECT Name, Population
FROM country
ORDER BY Population DESC
使用排序获取最大值
SELECT gpa
FROM user_profile
WHERE university='复旦大学'
ORDER BY gpa DESC
LIMIT 0,1