In this blog psot we show how to restrict users from entering duplicated data by using SQL UNIQUE Constraint. In our examples we will use unique constraint on one field and we will use Email Address and one multiple fields and we will use First Name, Surname and Birth Date. This article has been written to support our SQL Tutorial and Exam Guide 70-461 Querying SQL Server 2012.
Book Review: Big Red - Voyage of a Trident Submarine
I've grown up reading Tom Clancy and probably most of you have at least seen Red October, so this book caught my eye when browsing used books for a recent trip. It's a fairly human look at what's involved in sailing on a Trident missile submarine...
2009-03-10
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