What's a good use for a UNIQUE filtered index?
(November 17, 2011)
I've used them in a manner similar to Rafi, where a given entity has multiple attributes, only one of which can be active (IsActive = 1) at a time. In the past we used a trigger to enforce this...
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As far as I'm concerned we'll likely always have SQL Injection around to haunt us. Even though this attack vector has been well-publicized and well-documented for well over a decade (and then some), failure to account for it continues to pop all the time—even in catastrophic places....More