| http://www.w3.org/ns/prov#value | - SQLkiwi (7/4/2011)James Goodwin (7/1/2011)It would be nice if there was a more clean SQL syntax than (X is NULL OR X <> 'Value'), but that is implementation, not theory.There is an alternative to that, which I use quite a lot:http://sqlblog.com/blogs/paul_white/archive/2011/06/22/undocumented-query-plans-equality-comparisons.aspxNice blog post, Paul.
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