Question

Say I have the following table:

--------------------
|ID|Yes|No|Filename|
|01|15 |10|1.php   |
|02|12 |5 |2.php   |
|03|6  |1 |3.php   |
--------------------

What I want to do is apply Yes/Yes+No in an sql select statement and echo the highest value’s filename.

The Yes and No are updated from time to time, so would it be better to create another column to handle the equation, or can an equation be used in a sql statment? And what would the select statment look like for this?

Thanks

Answer 1

for MySQL,

SELECT  Filename, 
        CAST((Yes / (Yes + No)) AS DECIMAL(10,5)) rating
FROM    table1
WHERE   CAST((Yes / (Yes + No)) AS DECIMAL(10,5)) =
        (
            SELECT MAX(rating)
            FROM
            (
                SELECT CAST((Yes / (Yes + No)) AS DECIMAL(10,5)) rating
                FROM table1
            ) x
        )

SQLFiddle Demo

for SQL Server

SELECT   TOP 1 WITH TIES Filename, 
         (Yes / (Yes + No)) rating
FROM     table1
ORDER BY rating DESC

SQLFiddle Demo