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Pull Date-Effective Records That Intersect A Given Range

Basics of how to pull records that intersect a date range from a temporal (aka date-effective) database.

-- @rangeStart is the start of the date range of interest
-- @rangeEnd is the end of the date range of interest
-- If you use null to signify infinity, then use the commented line instead of the one above it.
-- Assumes both intervals are [Start, End), ie, start is inclusive, end is exclusive.
select *
from DateEffectiveTable
where StartDate < @rangeEnd
  and EndDate > @rangeStart
  -- and coalesce(endDate, '9999-12-31') > @rangeStart
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