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Consider the following SQL query:
SELECT DISTINCT department_id FROM employees;
What does the above query return?
What does the above query return?
- a)Department IDs of all employees
- b)Department IDs of employees with distinct salaries
- c)Department IDs of employees in the 'Sales' department
- d)Department IDs of all unique departments
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Consider the following SQL query:SELECT DISTINCT department_id FROM em...
The SQL query retrieves distinct department IDs from the "employees" table.
Most Upvoted Answer
Consider the following SQL query:SELECT DISTINCT department_id FROM em...
Answer:
The given SQL query
SELECT DISTINCT:
- The
- In this case, it is used to fetch only the unique department IDs.
department_id:
- It specifies the column name from which the distinct values are to be retrieved.
- Here, it refers to the "department_id" column in the "employees" table.
FROM employees:
- It specifies the table from which the data is to be retrieved.
- In this case, it is the "employees" table.
What does the query return?
The above query will return the department IDs of all unique departments present in the "employees" table. It does not specifically filter based on any criteria such as salaries or department names.
Explanation:
- The query selects the "department_id" column from the "employees" table.
- Applying the
- If there are duplicate department IDs in the table, they will be filtered out, and only one instance of each unique department ID will be included in the result set.
- This query is useful when we want to obtain a list of all the unique department IDs present in the "employees" table, regardless of any other attributes or conditions.
Conclusion:
In conclusion, the given SQL query returns the department IDs of all unique departments present in the "employees" table. It does not consider any other attributes or conditions, such as salaries or department names.
The given SQL query
SELECT DISTINCT department_id FROM employees; retrieves the distinct department IDs from the "employees" table. Let's analyze the query in detail:SELECT DISTINCT:
- The
SELECT DISTINCT statement is used to retrieve unique or distinct values from a column in a table.- In this case, it is used to fetch only the unique department IDs.
department_id:
- It specifies the column name from which the distinct values are to be retrieved.
- Here, it refers to the "department_id" column in the "employees" table.
FROM employees:
- It specifies the table from which the data is to be retrieved.
- In this case, it is the "employees" table.
What does the query return?
The above query will return the department IDs of all unique departments present in the "employees" table. It does not specifically filter based on any criteria such as salaries or department names.
Explanation:
- The query selects the "department_id" column from the "employees" table.
- Applying the
DISTINCT keyword ensures that only unique department IDs are returned.- If there are duplicate department IDs in the table, they will be filtered out, and only one instance of each unique department ID will be included in the result set.
- This query is useful when we want to obtain a list of all the unique department IDs present in the "employees" table, regardless of any other attributes or conditions.
Conclusion:
In conclusion, the given SQL query returns the department IDs of all unique departments present in the "employees" table. It does not consider any other attributes or conditions, such as salaries or department names.
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Consider the following SQL query:SELECT DISTINCT department_id FROM employees;What does the above query return?a)Department IDs of all employeesb)Department IDs of employees with distinct salariesc)Department IDs of employees in the Sales departmentd)Department IDs of all unique departmentsCorrect answer is option 'D'. Can you explain this answer?
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Consider the following SQL query:SELECT DISTINCT department_id FROM employees;What does the above query return?a)Department IDs of all employeesb)Department IDs of employees with distinct salariesc)Department IDs of employees in the Sales departmentd)Department IDs of all unique departmentsCorrect answer is option 'D'. Can you explain this answer? for Software Development 2025 is part of Software Development preparation. The Question and answers have been prepared according to the Software Development exam syllabus. Information about Consider the following SQL query:SELECT DISTINCT department_id FROM employees;What does the above query return?a)Department IDs of all employeesb)Department IDs of employees with distinct salariesc)Department IDs of employees in the Sales departmentd)Department IDs of all unique departmentsCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Software Development 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following SQL query:SELECT DISTINCT department_id FROM employees;What does the above query return?a)Department IDs of all employeesb)Department IDs of employees with distinct salariesc)Department IDs of employees in the Sales departmentd)Department IDs of all unique departmentsCorrect answer is option 'D'. Can you explain this answer?.
Consider the following SQL query:SELECT DISTINCT department_id FROM employees;What does the above query return?a)Department IDs of all employeesb)Department IDs of employees with distinct salariesc)Department IDs of employees in the Sales departmentd)Department IDs of all unique departmentsCorrect answer is option 'D'. Can you explain this answer? for Software Development 2025 is part of Software Development preparation. The Question and answers have been prepared according to the Software Development exam syllabus. Information about Consider the following SQL query:SELECT DISTINCT department_id FROM employees;What does the above query return?a)Department IDs of all employeesb)Department IDs of employees with distinct salariesc)Department IDs of employees in the Sales departmentd)Department IDs of all unique departmentsCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Software Development 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following SQL query:SELECT DISTINCT department_id FROM employees;What does the above query return?a)Department IDs of all employeesb)Department IDs of employees with distinct salariesc)Department IDs of employees in the Sales departmentd)Department IDs of all unique departmentsCorrect answer is option 'D'. Can you explain this answer?.
Solutions for Consider the following SQL query:SELECT DISTINCT department_id FROM employees;What does the above query return?a)Department IDs of all employeesb)Department IDs of employees with distinct salariesc)Department IDs of employees in the Sales departmentd)Department IDs of all unique departmentsCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Software Development.
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Consider the following SQL query:SELECT DISTINCT department_id FROM employees;What does the above query return?a)Department IDs of all employeesb)Department IDs of employees with distinct salariesc)Department IDs of employees in the Sales departmentd)Department IDs of all unique departmentsCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for Consider the following SQL query:SELECT DISTINCT department_id FROM employees;What does the above query return?a)Department IDs of all employeesb)Department IDs of employees with distinct salariesc)Department IDs of employees in the Sales departmentd)Department IDs of all unique departmentsCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of Consider the following SQL query:SELECT DISTINCT department_id FROM employees;What does the above query return?a)Department IDs of all employeesb)Department IDs of employees with distinct salariesc)Department IDs of employees in the Sales departmentd)Department IDs of all unique departmentsCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
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