Some rows of a User table are shown below: User ucode name phone scode 7 Alex 847 - 3902 UX 8 Tony 203 - 3902 PX 9 Charles BD 11 Mary 877 - 3333 BD Which of the following queries retrieves the rows where there is no phone? a. SELECT * FROM User WHERE phone IS NULL b. SELECT * FROM User WHERE phone = “ ” c. SELECT * FROM User WHERE phone NOT IS NULL d. SELECT * FROM User WHERE phone > 0

Some rows of a User table are shown below: User ucode name phone scode 7 Alex 847 - 3902 UX 8 Tony 203 - 3902 PX 9 Charles BD 11 Mary 877 - 3333 BD Which of the following queries retrieves the rows where there is no phone? a. SELECT * FROM User WHERE phone IS NULL b. SELECT * FROM User WHERE phone = “ ” c. SELECT * FROM User WHERE phone NOT IS NULL d. SELECT * FROM User WHERE phone > 0

Oracle 12c: SQL

3rd Edition

ISBN:9781305251038

Author:Joan Casteel

Publisher:Joan Casteel

Chapter5: Data Manipulation And Transaction Control

Section: Chapter Questions

Problem 4MC: Which of the following statements deletes all rows in the HOMEWORK10 table? a. DELETE FROM...

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ucode	name	phone	scode
7	Alex	847 - 3902	UX
8	Tony	203 - 3902	PX
9	Charles		BD
11	Mary	877 - 3333	BD

	a.	SELECT * FROM User WHERE phone IS NULL
	b.	SELECT * FROM User WHERE phone = “ ”
	c.	SELECT * FROM User WHERE phone NOT IS NULL
	d.	SELECT * FROM User WHERE phone > 0