Computer Science
Assertion (A): COUNT() function ignores distinct values.
Reasoning (R): Distinct clause ignores duplicate values.
- 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.
Answer
A is false but R is true.
Explanation
The COUNT() function in SQL does not ignore distinct values, it counts all occurrences, including distinct values. On the other hand, the DISTINCT keyword in SQL eliminates duplicate values, ensuring that only distinct values are considered.
Related Questions
Assertion (A): A foreign key is an attribute whose value is derived from the primary key of another relation.
Reasoning (R): A foreign key is used to represent the relationship between tables or relations.
- 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): Order by clause is used to sort the records of a table in ascending or descending order.
Reasoning (R): For sorting in ascending or descending order, ASC and DESC keywords are used along with the Order by clause.
- 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): 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.