SOL-C01 Exam Dumps | You have a table named 'raw_events' with a VARIANT column called containing JSON data. The JSON structure

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Question 99/155

You have a table named 'raw_events' with a VARIANT column called containing JSON data. The JSON structure has varying levels of nesting. You need to extract the 'user_id', 'event_type', and the first element of the 'items' array (if it exists) for each event. Which of the following SQL queries is the MOST efficient and correct way to achieve this?

Correct Answer: B

Option B is the most robust and efficient. It explicitly checks if the 'items' array exists and has at least one element using 'ARRAY_SIZE'. If it does, it extracts the first element; otherwise, it returns NULL. This handles cases where the 'items' array is missing or empty. Option A will throw an error if 'items' is not an array. Option C uses FLATTEN' , which is unnecessary and inefficient for extracting just the first element. Option D uses and ` , implying the item is a number, which may not be true in all cases. Also TRY TO NUMBER is incorrect syntax. Option E using IS_ARRAY without checking array size will still cause a problem if the array is empty.

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