Free Programming Tutorials

This scenario occurs often in applications that need to rank and paginate data by some criterion such as popularity, score, or recency. Forums are a good example, as are hot lists on social bookmarking sites.Because the example gaming site has millions of users, the leaderboards use pagination. This means they require a combination of ranking and limits with offets. This is a common requirement, and it’s hard to optimize. The obvious queries will probably not perform well under heavy  
continue >>