You are using an Azure Synapse Analytics serverless SQL pool to query network traffic logs in the Apache Parquet format. A sample of the data is shown in the following table. You need to create a…

The JSON_VALUE function is used in Transact-SQL to extract a scalar value from a JSON string. Since network traffic logs often contain semi-structured data that can be interpreted as JSON within Parquet files, JSON_VALUE is the appropriate function to parse and retrieve a specific field like the source IP address.

FOR JSON is used to format query results as JSON text, not to parse JSON data to extract values.

CONVERT is used to change data types or character sets and is not designed for parsing JSON structures to extract specific fields.

FIRST_VALUE is a window function that returns the first value in an ordered set of rows, which is unrelated to parsing JSON data.