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Which of the following is illegal?
- ASELECT SYSDATE - SYSDATE FROM DUAL;
- BSELECT SYSDATE - (SYSDATE - 2) FROM DUAL;
- CSELECT SYSDATE - (SYSDATE + 2) FROM DUAL;
- DNone of these
Correct answer: D
Discussion 1
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CCommunity
None of these
SELECT SYSDATE - SYSDATE FROM DUAL; outputs 0
SELECT SYSDATE - (SYSDATE - 2) FROM DUAL; outputs 2
SELECT SYSDATE - (SYSDATE + 2) FROM DUAL; outputs -2
SELECT SYSDATE - SYSDATE FROM DUAL; outputs 0
SELECT SYSDATE - (SYSDATE - 2) FROM DUAL; outputs 2
SELECT SYSDATE - (SYSDATE + 2) FROM DUAL; outputs -2