TSQL Challenge 53 - Finding empty and non-empty intervals among many start-end intervals
A SQL Server instance is set up to log the session start time and end time into a table. Given this table, your job is to find all time intervals in which no one is logged in. For the intervals separated by these empty intervals show the maximum number of simultaneous users.
This problem is related to a reservation system where customers book a service and pay it in one or more transactions which may happen on different dates.
2010-06-28
1,574 reads
The idea of this challenge is to clean up the phrase from the words identified as 'noise' words from the beginning and end of sentences.
2010-06-14
2,659 reads
This is a matrix transposition challenge. Your job is to change the position of the numbres in a 5x5 matrix.
2010-05-17
2,132 reads
Your job is to reorganize the items in the table by sales amount (quantity * price). Reorganize the items from left to right, bottom to top. The item with the highest sales amount should come on top left of each invoice.
2010-05-03
1,836 reads
Here is another scheduling problem that deals with the allotment of classrooms for various training programs. Your chalenge is to read the source data and build an output result set that shows the weekly schedule of each training topic and the class room in which training is scheduled.
2010-03-22
1,783 reads
