In this MySQL challenge, your query should return LastName and the sum of Age from your table for all users with a LastName = Smith. The column title of the summed ages should be SumAge. Your output ...

Contribute to sonakshic/HackerRank-SQl development by creating an account on GitHub.

SQL Server 2005I'm trying to get a single table to return a bunch of rows and the the sums of some of the solumns as the last row. I can't quite get it the way I want. I've been trying something ...

In decision-support systems, ranking-aware queries have been gaining much attention recently. In this paper we introduce an efficient algorithm about ranking the results of partial-sum queries in OLAP ...

Range sum queries are fundamental part of modern data analysis application. But traditional query algorithms can not be applied on data stream, which is an unbounded sequence of data elements ...