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What is the output of this SQL snippet if the price column contains NULL values?

SELECT SUM(price) FROM products;

Which of the following is a key characteristic that distinguishes a PL/SQL `FUNCTION` from a PL/SQL `PROCEDURE`?

A materialized view differs from a normal view because it:

What is the primary purpose of a `SEQUENCE` in SQL?

In PL/SQL, what type of parameter allows a procedure to both receive a value from the calling environment and return a modified value back to it?

Recursive CTEs are mainly used for:

Which operator is used to combine results of two SELECT queries and remove duplicates?

Which SQL function returns the largest value in a column?

Which of the following can be used to avoid duplicate entries in a column?

In PL/SQL, what type of parameter allows a procedure to both receive a value from the calling environment and return a modified value back to it?