Exam LookML-Developer Topic 3 Question 1 Discussion

Actual exam question for Google's LookML-Developer exam
Question #: 1
Topic #: 3

A user is seeing an error in the Explore that indicates the primary key defined for a one-million-row table is not unique.
How can the developer use SQL Runner to troubleshoot quickly?

A. Create a query that selects all the fields from the table, and sort by primary key. B. Create a query that counts how many occurrences of the primary key value are in the base view, and sort by count. C. Create a query that concatenates two columns to create a compound primary key. D. Create a query that selects the primary key from the base view, and look for duplicates.

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