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By Jacob Sebastian,
The challenge is to find the minimal set of intervals without creating gaps.
There is a table with groups of overlapping date intervals where each group has no gaps. Given this table, your job is to find the minimum set of date intervals without creating gaps in the group. A solution is defined such that if you remove any one of the intervals in the solution you will create a gap.
create intervals from effective dates and aggregate like and adjacent intervals
Creating a group on data without a easy relationship
This article discusses minimal Logging in SQL Server.
Creating time intervals on overlapping events
sql time intervals problem