OCA Oracle Database 12c SQL Fundamentals I Exam Guide (Exam 1Z0-061), 2nd Edition

CERTIFICATION OBJECTIVES

5.01   Describe Various Types of Conversion Functions Available in SQL

5.02   Use the TO_CHAR, TO_NUMBER, and TO_DATE Conversion Functions

5.03   Apply Conditional Expressions in a SELECT Statement

       Two-Minute Drill

Q&A  Self Test

Functions that operate on numeric, date, and character information were discussed in Chapter 4, and familiarity with that content is assumed in this chapter. Sometimes data is not available in the exact format a function is defined to accept, resulting in a data type mismatch. To avoid mismatch ...