mySql query assistance, please!
September 5, 2010 12:49 PM Subscribe
mySQL query question about calculating percentages in a table.
posted by omnipotentq to computers & internet (3 answers total) 1 user marked this as a favorite
I have an array of fixed values (let's call it [Val0,Val1,Val2]) and a table with one of its columns containing one of the values from the array in it.
This table is constantly having more data shoved into it, and all the while, the data is one of the X values from the array (I've shown 3 here, but the actual number fluctuates up and down). The values in each row the table will *always* be one of the values from the array, be design.
How can I devise a query in mySQL/PHP that will print out an on-the-fly percentage breakdown by the specific values that are in the array? So for the above example, it would say that Val1=66%, Val0=16% and Val2=16%.
Bonus question: The values in the table are actually longer strings (URLs, to be specific) and the values in my array are the "www.example.com" portion of the URL, so I'll have to strip down each value in the table as I iterate through to compare, or I suppose I could use a substr comparison. Any tips on integrating a strip function into this whole lot would be appreciated (such as what would be better processing time-wise, to do it with a parse_url or a substr function), but I think I have that part figured out. I'm just trying to figure out the whole percentage calculation on-the-fly bit.