Computer Science
Assertion (A): Cartesian product of two sets (A and B) is defined as the set of all possible ordered pairs denoted by (A + B).
Reasoning (R): The Cartesian product is also known as the cross product of two sets. The Cartesian product of two tables can be evaluated such that each row of the first table will be paired with all the rows in the second table.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
SQL Queries
1 Like
Answer
A is false but R is true.
Explanation
The Cartesian product of two sets A and B is defined as the set of all possible ordered pairs, denoted as A × B. It is also known as the cross product or cross-join of two sets. In the context of databases, the Cartesian product of two tables can be evaluated such that each row of the first table is paired with all the rows in the second table.
Answered By
1 Like
Related Questions
Assertion (A): The HAVING clause is used with GROUP BY clause and aggregate functions.
Reasoning (R): WHERE clause specifies the condition on individual rows or records.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): SQL queries are performed on a table created under a database.
Reasoning (R): The database is a folder created by the user in MySQL workbench. Thereafter, the tables are created in a database where various queries can be performed using SQL commands.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Assertion (A): Aggregate functions in SQL operate on multiple set of values and return a single value as the output.
Reasoning (R): The aggregate functions are used to perform operations on a group of values. Some common aggregate functions are SUM(), MAX(), MIN(), etc.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
What is an Alternate Key ?