Exam Professional-Data-Engineer Topic 1 Question 43 Discussion

Actual exam question for Google's Professional-Data-Engineer exam
Question #: 43
Topic #: 1
Which of the following statements about Legacy SQL and Standard SQL is not true?

Suggested Answer: D Vote an answer

You do not set a query language for each dataset. It is set each time you run a query and the default query language is Legacy SQL.
Standard SQL has been the preferred query language since BigQuery 2.0 was released. In legacy SQL, to query a table with a project-qualified name, you use a colon, :, as a separator. In standard SQL, you use a period, ., instead.
Due to the differences in syntax between the two query languages (such as with project-qualified table names), if you write a query in Legacy SQL, it might generate an error if you try to run it with Standard SQL.
Reference:
https://cloud.google.com/bigquery/docs/reference/standard-sql/migrating-from-legacy-sql

by Stacey at Mar 08, 2026, 05:31 PM

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