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Which two tasks can your perform by using the TO_CHAR function? (Choose two)
A. Convert 10 to 'TEN'
B. Convert '10' to 10
C. Convert '10' to '10'
D. Convert 'TEN' to 10
E. Convert a date to a character expression
F. Convert a character expression to a date
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Answer: C, E
Explanation:
TO_CHAR(x) function is used to convert the value x to a character or converts a date to a character string using
formatting conventions.
Incorrect Answers
A: This function cannot convert the number to the string representing number spelled out.
B: TO_CHAR() function cannot convert the character value to a number. TO_NUMBER() function does this.
D: This function is not able to convert the string representing number spelled out to the number itself.
F: TO_CHAR() function cannot convert a character expression to a date. TO_DATE() function does this.
OCP Introduction to Oracle 9i: SQL Exam Guide, Jason Couchman, p. 86-87
Chapter 2: Limiting, Sorting, and Manipulating Return Data