Data Engineering Associate with Databricks Practice Exam

Which keyword would you use to navigate through nested JSON values in SQL?

1. USE

2. NAVIGATE

3. SELECT

4. EXTRACT

The correct answer is: SELECT

The correct choice for navigating through nested JSON values in SQL is the keyword associated with retrieving data from tables, and that is "SELECT." When dealing with nested JSON, SQL provides functionalities that allow you to access specific attributes within a JSON structure. The "SELECT" statement is foundational for querying data in SQL databases, including those that contain JSON formatted fields. By utilizing JSON functions within a SELECT statement, you can target nested attributes effectively. For instance, if you have a JSON column, you might use "SELECT" in conjunction with functions like JSON_VALUE, JSON_QUERY, or their equivalents in a specific SQL dialect, to extract information from complex nested structures. This method allows for direct interaction with the JSON data and ensures that you retrieve the precise information needed from specific layers within the JSON object. The other keywords do not serve the purpose of directly accessing or querying nested JSON data in the context provided. While keywords like "USE" refer to selecting the database to perform queries or "EXTRACT" may suggest retrieving certain data points, they do not specifically pertain to the structured navigation required for nested JSON in SQL.