Oracle 12c: SQL
3rd Edition
ISBN: 9781305251038
Author: Joan Casteel
Publisher: Cengage Learning
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Chapter 4, Problem 7MC
The FOREIGN KEY constraint should be added to which table?
- a. the table representing the “one” side of a one-to-many relationship
- b. the parent table in a parent-child relationship
- c. the child table in a parent-child relationship
- d. the table that doesn’t have a primary key
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The Car Maintenance team also wants to store the actual maintenance operations in the database. The team wants to start with a table to store CAR_ID (CHAR(5)), MAINTENANCE_TYPE_ID (CHAR(5)) and MAINTENANCE_DUE (DATE) date for the operation. Create a new table named MAINTENANCES. The PRIMARY_KEY should be the combination of the three fields. The CAR_ID and MAINTENACNE_TYPE_ID should be foreign keys to their original tables. Cascade update and cascade delete the foreign keys.
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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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- What is the difference between a PRIMARY KEY constraint and a UNIQUE constraint?arrow_forwardUsing tables named T1 and T2, write a query example for each of the three join types you described in Question 2. Assume that T1 and T2 share a common column named Cl.arrow_forwardHow is adding a NOT NULL constraint to an existing table different from adding other types of constraints?arrow_forward
- When must you define constraints at the table level rather than the column level?arrow_forwardSubject: DatabaseANSWER THE FOLLOWING QUESTIONS BASED ON THE GIVEN TABLE a) write the DDL statement to create the table CUSTOMER_DETAIL with the primary key constraint. (use most appropriate data type for each attribute). b) Add NOT NULL constraint to attribute of CustomerName c) Add a column named "Country" in the CUSTOMER_DETAIL table d) Rename the table to CUSTOMERarrow_forward1) List all the functional dependencies of the above table. (Note, this requires you to state all the functional dependencies, not just count the number). 2) What normal form(s) is the table currently in? Justify your answer.arrow_forward
- Task 4- Normalisation I. Which normal form is the following table in? II. Transfer the table to 3rd Normalised form and show the conversion to the third form. In each normal form, show the tables, Primary Keys and Foreign keys. II. AgreementID Duration(months) |UnitID UnitAddres NoOfRooms Building!D BuildingName BuildingAddress Signingdate 2 BO01 2 BO02 2 BO02 1 BO04 2 BO03 AGO01 AGO02 AGO03 12 U001 6 U002 12 U002 6 U003 Marsfiled Chatswood Chatswood Burwood Marsfiled White Palace Ryde Martin Place 20/04/2021 13/05/2019 13/02/2020 20/04/2021 13/07/2018 12/02/2021 Parramatta Martin Place Parramatta AGO02 AGO01 Saunders Close Wagga Wagga Twin Tower Wollongong Saunders Close Wagga Wagga 12 U001 AGO04 18 U003 Burwood 1 BO04arrow_forwardFor table EP, the attribute is a foreign key referencing target table For table EP, the attribute is a foreign key referencing target table For table ER the attribute is a foreign key referencing target table For table ER the attribute is a foreign key referencing target tablearrow_forwardConvert the following table to third normal form (3NF). In this table, StudentNum determines StudentName, NumCredits, AdvisorNum, and AdvisorName. Advisor Num determines AdvisorName. CourseNum determines Description. The combination of StudentNum and CourseNum determines Grade. STUDENT (StudentNum, StudentName, NumCredits, AdvisorNum, AdvisorName, CourseNum, Description, Grade). Identify the primary key for the original table and the primary keys for the resulting tables. Indicate the foreign keys with italic font. Give meaning names to the resulting tables.arrow_forward
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