Oracle 12c: SQL
3rd Edition
ISBN: 9781305251038
Author: Joan Casteel
Publisher: Cengage Learning
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Textbook Question
Chapter 4, Problem 16MC
Which of the following types of constraints can’t be created at the table level?
- a. NOT NULL
- b. PRIMARY KEY
- c. CHECK
- d. FOREIGN KEY
- e. None of the above constraints can be created at the table level.
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Chapter 4 Solutions
Oracle 12c: SQL
Ch. 4 - What is the difference between a PRIMARY KEY...Ch. 4 - How can you verify the constraints that exist for...Ch. 4 - A table can have a maximum of how many PRIMARY KEY...Ch. 4 - Which type of constraint can be used to make...Ch. 4 - Which type of constraint should you use to ensure...Ch. 4 - How is adding a NOT NULL constraint to an existing...Ch. 4 - When must you define constraints at the table...Ch. 4 - Prob. 8RQCh. 4 - What is the difference between disabling a...Ch. 4 - Prob. 10RQ
Ch. 4 - Prob. 1MCCh. 4 - Which of the following is not a valid constraint...Ch. 4 - Which of the following SQL statements is invalid...Ch. 4 - What is the maximum number of PRIMARY KEY...Ch. 4 - Prob. 5MCCh. 4 - How many NOT NULL constraints can be created at...Ch. 4 - The FOREIGN KEY constraint should be added to...Ch. 4 - What is the maximum number of columns you can...Ch. 4 - Which of the following commands can you use to...Ch. 4 - Prob. 10MCCh. 4 - In the initial creation of a table, if a UNIQUE...Ch. 4 - Which type of constraint should you use on a...Ch. 4 - Which of the following commands can be used to...Ch. 4 - Which of the following keywords allows the user to...Ch. 4 - Which of the following data dictionary objects...Ch. 4 - Which of the following types of constraints cant...Ch. 4 - Suppose you created a PRIMARY KEY constraint at...Ch. 4 - You’re creating a new table consisting of three...Ch. 4 - Which of the following types of restrictions can...Ch. 4 - Which of the following is the valid syntax for...Ch. 4 - Prob. 1HOACh. 4 - Prob. 2HOACh. 4 - Prob. 3HOACh. 4 - Add a column named Base_salary with a datatype of...Ch. 4 - Create a table named BOOK_STORES to include the...Ch. 4 - Add a constraint to make sure the Rep_ID value...Ch. 4 - Change the constraint created in Assignment #6 so...Ch. 4 - Create a table named REP_CONTRACTS containing the...Ch. 4 - Produce a list of information about all existing...Ch. 4 - Issue the commands to disable and then enable the...
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- Which of the following is not a valid constraint type? ( refer to the tables in the JustLee Books database). a. PRIMARY KEYS b. UNIQUE c. CHECK d. FOREIGN KEYarrow_forwardSuppose you have a table with a primary key composed of two columns. When another column in this table is dependent on only one of the two columns in the primary key, this poses a risk for _____. a. update anomalies b. functional dependency c. qualification errors d. function splittingarrow_forwardWhich of the following commands can you use to rename a constraint? RENAME ALTER CONSTRAINT MOVE NEW NAME None of the above commands can be used.arrow_forward
- Which of the following is not a valid constraint type? a. PRIMARY KEYS b. UNIQUE c. CHECK d. FOREIGN KEYarrow_forwardWhat is the Candidate key defined as?arrow_forwardThe command DESC DEPARTMENTS shows the following information: Name A M G V Null? MANAGER D LOCATION ID DEPARTMENT ID NOT NULL NUMBER (4) DEPARTMENT NAME NOT NULL VARCHAR2 (30) NUMBER (6) NUMBER (4) Туре A developer then runs the following command ALTER TABLE ADD CONSTRAINT KEY (DEPARTMENT ID); What is the outcome ? DEPARTMENT PK A primary key for DEPARTMENTS is created. A foreign key for DEPARTMENTS is created. PRIMARY An error occurs because column DEPARTMENT_ID already has the constraint NOT NULL The command DESC does not show information of the primary key of a table, therefore we won't know if the command will or will not fail.arrow_forward
- Fast answer pleasearrow_forwardWhich of the following commands can you use to rename a constraint? ( refer to the tables in the JustLee Books database). a. RENAME b. ALTER CONSTRAINT c. MOVE d. NEW NAME e. None of the above commands can be used.arrow_forwardThe Driver Relationship team realized that maintaining driver IDs is difficult and requested an automatic way of incrementing the value when a new driver is added. You need to make the changes on the table to automatically increment the DRIVER_ID. After the change, you need to insert the following driver: First Name: Nursin Last Name: Yilmaz Driving License ID: 4141447 Start Date: 2021-12-28 Driving License Checked: True Rating: 4.0arrow_forward
- Domain Constraints means violations in size only Select one: O True O False Key constraint means violation when the primary key value is repeated Select one: O True O Falsearrow_forward3. What is a DEFAULT constraint?arrow_forwardThe Primary key must be O(A) Non Null O(B) Unique O(C) Option A or B O(D) Option A and Barrow_forward
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