Multiple choice technology databases

Which among these are pseudo columns

  1. rowid

  2. sysdate

  3. rownum

  4. all of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Oracle pseudo columns include ROWID (unique row identifier), ROWNUM (sequential number for each row returned), and SYSDATE (current date/time). These behave like columns but aren't physically stored in tables.

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