Explanation:
: SQL have character, numeric, date, conversion function. Incorrect answer :
1: SQL have character, numeric, date, conversion function.
3: SQL have character, numeric, date, conversion function.
4: SQL have character, numeric, date, conversion function.
6: SQL have character, numeric, date, conversion function.
Reference:
Introduction to Oracle9i : SQL, Oracle University Study Guide, 3-3

---