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Looker certifications Looker LookML Developer Exam

Looker LookML Developer Exam

Last Update Jan 18, 2026
Total Questions : 50

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Questions 2

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?

Options:

A.  

Create a query that selects all the fields from the table, and sort by primary key.

B.  

Create a query that selects the primary key from the base view, and look forduplicates.

C.  

Create a query that counts how many occurrences of the primary key value are in the base view, and sort by count.

D.  

Create a query that concatenates two columns to create a compound primary key.

Discussion 0
Ace
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Questions 3

A developer is building an e-commerce Explore with the following datasets: orders and users. The business user needs to be able to answer questions about sellers and buyers within the same Explore. Each order in the orders table reports a buyer and seller ID. The users table has the detailed information about the individual buyer and seller.

How should the Explore be defined to meet this requirement?

A)

Questions 3

B)

Questions 3

C)

Questions 3

D)

Questions 3

Options:

A.  

Option A

B.  

Option B

C.  

Option C

D.  

Option D

Discussion 0
Questions 4

A developer has User Specific Time Zones enabled fora Looker instance, but wants to ensure that queries run in Looker are as performant as they can be. The developer wants to add a datatype: date parameter to all dimension_group definitions without time data in a table-based view, so that time conversions don’t occur for these fields.

How can the developer determine to which fields this parameter should be applied through SQL Runner?

Options:

A.  

Open the Explore query in SQL Runner and validate whether removing the conversion from date fields changes the results.

B.  

Open the Explore query in SQL Runner to determine which fields are converted.

C.  

Use the CAST function in SQL Runner to ensure that all underlying fields are dates and conversions are not applied.

D.  

Use the Describe feature in SQL Runner to determine which fields include time data.

Discussion 0
Questions 5

A user needs to create a report that shows a count of all orders and of orders over $100.

Which solution should the developer implement to meet these requirements?

Options:

A.  

An always_filter parameter

B.  

A front-end filter in the Explore

C.  

A sql_always_where parameter

D.  

A filtered measure

Discussion 0
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