Oracle 12c: SQL
3rd Edition
ISBN: 9781305251038
Author: Joan Casteel
Publisher: Cengage Learning
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Chapter 4, Problem 3RQ
A table can have a maximum of how many PRIMARY KEY constraints?
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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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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- How is adding a NOT NULL constraint to an existing table different from adding other types of constraints?arrow_forwardWhen must you define constraints at the table level rather than the column level?arrow_forwardWhat is the maximum number of columns you can define as a primary key when using the column-level approach to creating a table? a. 0 b. 1 c. 30 d. 255arrow_forward
- What is the maximum number of PRIMARY KEY constraints allowed for a table? a. 1 b. 2 c. 30 d. 255arrow_forwardYou’re creating a new table consisting of three columns: Col1, Col2, and Col3. Col1 should be the primary key and can’t have any NULL values, and each entry should be unique. Col3 must not contain any NULL values either. How many total constraints do you have to create? 1 2 3 4arrow_forwardA unique identifier for a data row that consists of more than one field is commonly called a: primary plus key composite primary key foreign key none of the abovearrow_forward
- Which type of constraint can be used to make certain the category for a book is included when a new book is added to inventory?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_forwardExplain the difference between truncating a table and deleting a table.arrow_forward
- Table name: Products Column Role Data Type Length Constraint Name P ID Stores the ID of a product Number 8. Primary key P Name Stores the name of a product Varchar2 25 P_entryDate Stores the entry date of a product Stores the expiry date of a product Date Cannot be null P_Expiry P Expiry date should be greater than P entryDate Date P Price Stores the price of a product Number 3,2 Cannot be null a) Write in SQL a command that creates the table Products according to the above description (2 marks). b) Write in SQL a statement that adds to the table Products a new column named supplierID of type Number(5). This column should be defined as a foreign key that relates the table Products to the table Supplier (1.5 marks). c) Write in SQL a query that lists all the details of products arranged in descending order according to the entry date (1.5 marks).arrow_forwardWrite Create Table SQL statements Work Session table The table must have a primary key. The table must have appropriate foreign key constraints. Foreign keys must have the same name, datatype and size of the primary key that they refer to The following columns datatypes and sizes and named constraints must be used Column DataType Constraint WorkYear number(4) Range 2019 - 2020 WorkWeek number(2) Range 1-52 WorkHours number(4,2) Range 0.5 – 99.99 BID NUMBER(4) ,AUTHID NUMBER(4)arrow_forwardSQL JOIN clauses are used to combine rows from two or more tables based on a related column between them. True Falsearrow_forward
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