从数据库获取最高的5个值

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问题描述

大家好，
我有一张桌子，存储学生的百分比.我想从中获得最高的列表(获得最高3％的获得学习的学生).所以哪个查询会更好.实际上我已经尝试过max和top函数，但它们不适合.max仅给出一个值并且top将仅给出数据库中的前3条记录.
所以如何获得最高的3条记录.

Hello All,
I have a table which stores the percentage of students. I wabt to get the topper list from it(getting highest 3 percentage acquired students).so which query will be better for it.actually i have tried max aand top functions but they are not suitable.max will give only one value and top will give only first 3 records from database.
so how to get highest 3 records.

推荐答案

SELECT TOP 5...

????

SELECT <fields> FROM <tablename> WHERE <condition> LIMIT <startnumber>,<count> ORDER BY <field> ASC

或者(我没有注意到SQL2005不支持LIMIT):

Or (I hadn''t noticed SQL2005 didn''t support LIMIT):

SELECT Rank, ID, Percent FROM
    ( SELECT Rank = ROW_NUMBER() OVER (ORDER BY Percent), ID
      FROM myTable
    ) i 
WHERE 
    Rank BETWEEN 1 and 5 
ORDER BY 
    Rank

我还没有测试过，但是应该可以.

I haven''t tested it, but it should work.

SELECT TOP 3 FROM your_table ORDER BY column_to_sort

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