Multiple choice technology databases

How to change <> null in sybase to SQL?

  1. is not null

  2. is null

  3. != null

  4. <> null

Reveal answer Fill a bubble to check yourself
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.