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Databricks Certified Data Engineer - Associate

Databricks Certified Data Engineer - Associate

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In the context of Databricks and Delta Lake, managing and optimizing data storage while preventing duplication is critical. Delta Lake provides various functionalities to handle data efficiently. One such functionality is to ensure that no duplicate records are written into a Delta table during the data write process. Given this context, which of the following commands can be used to write data into a Delta table while avoiding the writing of duplicate records? Please select the correct option.

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Explanation:

The MERGE command in Delta Lake is used to combine the functionalities of both inserting new records and updating existing records in one atomic operation. By defining a match condition, typically based on a primary key or unique identifier, it can ensure that duplicate records are not created. This helps maintain data integrity by only inserting new records when necessary and updating existing records, thereby avoiding duplicates.

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