Database Systems: Design, Implementation, & Management
13th Edition
ISBN: 9781337627900
Author: Carlos Coronel, Steven Morris
Publisher: Cengage Learning
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Chapter 5, Problem 13RQ
Program Plan Intro
Composite primary key:
- In the table more than one column is used to specify the primary key is called as composite primary key or composite key.
- In this case, all foreign keys should also require including all the columns.
- Composite primary key contains different datatypes.
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Chapter 5 Solutions
Database Systems: Design, Implementation, & Management
Ch. 5 - Prob. 1RQCh. 5 - What kinds of data would you store in an entity...Ch. 5 - Prob. 3RQCh. 5 - What is a subtype discriminator? Give an example...Ch. 5 - Prob. 5RQCh. 5 - What is a disjoint subtype? Give an example.Ch. 5 - What is the difference between partial...Ch. 5 - Prob. 8RQCh. 5 - According to the data model, is it required that...Ch. 5 - Prob. 10RQ
Ch. 5 - Prob. 11RQCh. 5 - Prob. 12RQCh. 5 - Prob. 13RQCh. 5 - Prob. 14RQCh. 5 - When implementing a 1:1 relationship, where should...Ch. 5 - What is time-variant data, and how would you deal...Ch. 5 - Prob. 17RQCh. 5 - Prob. 1PCh. 5 - Prob. 2PCh. 5 - Prob. 3PCh. 5 - Prob. 4PCh. 5 - Prob. 5PCh. 5 - Prob. 6PCh. 5 - Prob. 7PCh. 5 - Prob. 8CCh. 5 - Prob. 9CCh. 5 - Prob. 10C
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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
- When would it be reasonable to make the assumption that two select statements drawn from the same database are consistent with one another? What type of circumstances would warrant such a reasonable assumption?arrow_forwardIs it possible to incorporate composite characteristics in composite keys?arrow_forwardWhat is the relationship between keys and data types?arrow_forward
- What distinguishes a primary key from a candidate key or a superkey?arrow_forwardWhen would it be reasonable to make the assumption that two select statements taken from the same database are consistent with one another? What type of circumstances would warrant such an assumption?arrow_forwardbranch(branchhame, branch+citysassets} customer (HD, Customer name, customer street, customer city) loan loan number branch_name, amounty borrower(ID; loan_number account (account_number, branch name, balance)e depositor (HDs account number)- Figure le Consider the bank database in Figure 1, where the primary keys are underlined. Each branch might have many loans or accounts, associated with borrowers or depositors, respectively. Construct the following SQL queries for this relational database. 1. Find the name of each branch that has at least one customer who has an account in the bank and who lives in the "Harrison" city. Make sure each branch name only appears once. 2. Find the ID of each customer who lives on the same street and in the same city as customer "12345". (1) Please use "tuple variables". e (2) Please use "derived relations" or “with". 3. Find the ID of each customer of the bank who has an account but not a loan. 4. Find the total sum of all loan amounts for each branch…arrow_forward
- Can the ability to utilise composite keys be determined independently of the composite characteristics used?arrow_forwardWhat are functional dependencies, and how do they relate to normalization?arrow_forwardOne of the components of a composite primary key might be a candidate key. What would you do if you found out this?arrow_forward
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