How is a composite key different than a single key? a) It can be referenced by a forign key b) It cannot contain null values c) It is made of multiple columns c) It contains only unique values

Q: C. Assume the following sample of data : Тeam TeamID 1001 | 1002 1003 | 1004 City Win TeamName…

A: Hey there, I am writing the required solution based on the above given question. Please do find the…

Q: What use does using keys serve exactly?

A: An characteristic or group of attributes that allows us to uniquely identify each tuple in the table…

Q: Complete the entries: 1. Set methods are commonly called v methods. 2. Set methods change v fields.…

A: As we know data of an object must be kept private. However, if any data member is declared private,…

Q: Inventory Database: Customers(custid, custName, address, phone, creditLimit) Orders (orderNo,…

A: After understanding information above To display the customer ID and the number of orders for each…

Q: What use does using keys serve exactly?

A: A key is a unique tag that represents certain data. In programming, A key is used for several data…

Q: Can a foreign key have duplicate values?

A: Foreign key: Foreign key in one table that points to primary key in another table. Can a foreign key…

Q: # Question 1 #Using the World database, in the city table, insert a new city for the Tasmania…

A: What is SQL: SQL is a language for interacting with databases. SQL is the standard language for…

Q: True or False: Referential integrity constraints ensure the values of a primary key are valid based…

A: Referential integrity constraints in a relational database ensure that the relationships between…

Q: What is the meaning of the primary key?

A: A primary key, sometimes known as the main keyword, is a unique identifier for each entry in a…

Q: What distinguishes a primary key from a candidate key or a superkey?

A: Distinguishing between the words primary key, candidate key, and super key

Q: What use does using keys serve exactly?

A: A key is an attribute or group of characteristics that a database management system (DBMS) uses to…

Q: What is a primary key?

A: Primary key: Primary key refers to an attribute which is used to uniquely recognize each tuple in…

Q: Q4. Problem Statement You are managing a database for a movie production company. The database…

A: To update the ratings of all movies directed by 'Lankesh' to a new rating of 3, you will need to use…

Q: . The basic operations that can be performed on relations are a. deletion b. insertion c.…

A: There are three basic operations that can change the states of relations in the data-base: Insert,…

Q: What distinguishes a primary key from a candidate key or a superkey?

A: Let's see about the primary and super key in detail with example. Primary key The Candidate key is a…

Q: . Foreign key is the one in which the ________ of one relation is referenced in another relation. a.…

A: In DBMS, keys are used to uniquely identify data in a table. Multiple keys from different tables can…