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For full explanations of both of these answers, visit plsqlchallenge.com, register or log in, and click the Closed/Taken tab in Play a Quiz, or go to bit.ly/r1Swv P.
Both datetime and interval data types consist of fields.
The returned date has the same time component as the date.
Bad Things Happen—Even in Good Programs Now that you have a solid foundation in working with key datatypes such as strings, numbers, and dates, I will switch focus in the next article of this series to an in-depth introduction to exceptions: how they can be raised and how you can handle them. Each PL/SQL 101 article offers a quiz to test your knowledge of the information provided in the article.
It does not, however, provide a function for returning the date of the first day. Answers to the Challenge Here are the answers to the PL/SQL Challenge questions in last issue’s “Working with Numbers in PL/SQL” article: Answer 1: The plch_ceil_and_floor function always returns either 1 or 0: 0 if the number passed to the function is an integer, 1 otherwise.
Answer 2: (a) and (b) are correct; (c) is incorrect.