Amazon-DEA-C01 Exam - Topic 2 Question 30 Discussion

Actual exam question for Amazon's Amazon-DEA-C01 exam

Question #: 30
Topic #: 2

A data engineer is using an AWS Glue ETL job to remove outdated customer records from a table that contains customer account information. The data engineer is using the following SQL command:

MERGE INTO accounts t USING monthly_accounts_update s

ON t.customer = s.customer

WHEN MATCHED THEN DELETE

What will happen when the data engineer runs the SQL command?

AAll customer records that exist in both the customer accounts table and the monthly_accounts_update table will be deleted from the accounts table.

BOnly customer records that are present in both tables will be retained in the customer accounts table.

CThe monthly_accounts_update table will be deleted.

DNo records will be deleted because the command syntax is not valid in AWS Glue.

Show Suggested Answer

Suggested Answer: A

In AWS Glue's SQL implementation (Spark SQL-compatible), the MERGE INTO statement supports conditional actions.

The clause WHEN MATCHED THEN DELETE deletes matching records from the target table (accounts) where the join condition is true.

''A MERGE INTO statement can perform updates, inserts, or deletes based on the match condition between source and target tables.''

-- Ace the AWS Certified Data Engineer - Associate Certification - version 2 - apple.pdf

by Wilson at May 29, 2026, 09:36 PM

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