Two suggestions to enhance constraints in SQL Server Alexander Kuznetsovhttp://sqlblog.com/blogs/alexander_kuznetsov/archive/2009/05/04/two-suggestio......
This continues the series on denormalizing, which started with this post about working hours and appointments
and continued with this post about running totals.
and a post about Storing intervals of time with no overlaps
Using ROWVERSION to enforce business rules
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