Which of the following best describes a correlated subquery?

SQL Subqueries and Functions Quiz

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Other
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Professional Development
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Easy
Harrison Kitema
Used 1+ times
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12 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
It runs only once and returns a single value.
It is independent of the outer query.
It references columns from the outer query.
It cannot be used in WHERE clauses.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which SQL clause can a subquery not be used in?
SELECT
GROUP BY
WHERE
FROM
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main advantage of using a CTE over a subquery?
CTEs are faster.
CTEs allow recursive operations and improve readability.
CTEs are always written inside the FROM clause.
CTEs return multiple result sets.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In SQL, what does the OVER() clause do in a window function?
It joins multiple tables.
It groups rows into a temporary table.
It defines the window of rows for the function to operate on.
It filters results before aggregation.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following functions is typically used with window functions?
SUM()
COUNT()
ROW_NUMBER()
MAX()
6.
OPEN ENDED QUESTION
3 mins • 1 pt
A subquery can return multiple rows and columns.
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7.
OPEN ENDED QUESTION
3 mins • 1 pt
Window functions always require a GROUP BY clause.
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