I would assume that this is referring to digital/smartphone ads.
Every combination of each genre with each instrument, even those that are not represented in the genre_instrument table
Explanation:
The CROSS JOIN clause creates a combination of every row from two or more different tables. Determining the number of results in a result set for a CROSS JOIN is as simple as the product of the number of records in each table.
Answer:
SSL Certificate
Explanation:
SSL Certificates tells whether a website is trusted or not, using a key that is identified. This electronic document indicates to the user whether the website is safe for a sensitive transaction. This is very important because users data needs to be secured, and a safe connection needs to be ensured from the server to the browser.
Answer:
b. The outer subquery initiates the process of execution in a subquery.
B is correct.
Explanation:
The important feature of a correlated subquery is: It must be executed repeatedly because it depends on the value from the outer SELECT, and must execute once for every value that the outer SELECT produces.