Databricks Certified Data Engineer - Associate

Explanation

The correct answer is A because:

1. INSERT INTO is the standard SQL command for appending new records to an existing table
2. The syntax INSERT INTO table_name VALUES (...) is the correct way to insert a single row of data
3. The other options are incorrect because:
   • B: UNION is used to combine results from multiple SELECT statements, not to insert data
   • C: The syntax is reversed - INSERT VALUES should be INSERT INTO
   • D: UPDATE is used to modify existing records, not to insert new ones
   • E: This syntax is completely invalid for inserting data

In Databricks Delta tables, you can use standard SQL INSERT INTO statements to append data to existing tables. The command preserves the existing data while adding new records.