How to change <> null in sybase to SQL?
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is not null
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is null
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!= null
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<> null
A
Correct answer
Explanation
SQL standards specify that NULL comparisons must use IS NULL or IS NOT NULL syntax rather than equality operators. The Sybase operator "<> null" (not equal to null) must be converted to the standard SQL "is not null". Using "!= null" or keeping "<> null" will not work correctly in standard SQL because NULL requires special handling.