DSA-C03 Exam Dumps | You are using the Snowflake Python connector from within a Jupyter Notebook running in VS Code to train

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Question 117/143

You are using the Snowflake Python connector from within a Jupyter Notebook running in VS Code to train a model. You have a Snowflake table named 'CUSTOMER DATA' with columns 'ID', 'FEATURE 1', 'FEATURE_2, and 'TARGET. You want to efficiently load the data into a Pandas DataFrame for model training, minimizing memory usage. Which of the following code snippets is the MOST efficient way to achieve this, assuming you only need 'FEATURE 1', 'FEATURE 2, and 'TARGET' columns?

Correct Answer: B

Option B, using is the most efficient. The method directly retrieves the data as a Pandas DataFrame, leveraging Snowflake's internal optimizations for transferring data to Pandas. It's significantly faster than fetching rows individually or all at once and then creating the DataFrame. Also, it only selects the needed Columns. Option A fetches all columns and then tries to build dataframe from the list which is less effective. Option C would require additional setup with sqlalchemy and may introduce extra dependencies. Option D is also correct, but option B utilizes snowflake's internal optimizations for pandas retrieval making it best choice. Option E is also not effective as it only fetches 1000 records.

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