What is the exact Difference between <> and != ?
Functionally there's no difference.
I think this is a matter of programmer preference: '<>' may be preferred by programmers who use various flavors of Pascal or Basic, while '!=' may be preferred by those who use languages which are descendants of C (e.g. C++, Java, C#). Interestingly, though, the C-style equality comparison operator ('==') is not supported in Oracle - how about in other flavors of SQL?
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