When working with time intervals, we often want to ask a couple of basic questions: Which time periods are not covered by our intervals? These are known as ''gaps''. What are the time ranges that we are fully covering? These are known as ''islands''. If you're unfamiliar with ''gaps'' and ''islands'' I highly recommend reading some ...

T-SQL Tuesday is the SQL Server blogosphere's first recurring, revolving blog party. The idea is simple: Each month a blog will host the party, and about a week before the second Tuesday of the month a theme will be posted. Any blogger that wishes to participate is invited to write a post on the chosen topic. The event is called ''T-SQL ...