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Databricks Exam Databricks Certified Data Engineer Associate Topic 3 Question 32 Discussion

Actual exam question for Databricks's Databricks Certified Data Engineer Associate exam
Question #: 32
Topic #: 3
[All Databricks Certified Data Engineer Associate Questions]

Which of the following SQL keywords can be used to convert a table from a long format to a wide format?

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Suggested Answer: A

The SQL keyword that can be used to convert a table from a long format to a wide format isPIVOT.The PIVOT clause is used to rotate the rows of a table into columns of a new table1.The PIVOT clause can aggregate the values of a column based on the distinct values of another column, and use those values as the column names of the new table1.The PIVOT clause can be useful for transforming data from a long format, where each row represents an observation with multiple attributes, to a wide format, where each row represents an observation with a single attribute and multiple values2.For example, the PIVOT clause can be used to convert a table that contains the sales of different products by different regions into a table that contains the sales of each product by each region as separate columns1.

The other options are not suitable for converting a table from a long format to a wide format.CONVERT is a function that can be used to change the data type of an expression3.WHERE is a clause that can be used to filter the rows of a table based on a condition4.TRANSFORM is a keyword that can be used to apply a user-defined function to a group of rows in a table5. SUM is a function that can be used to calculate the total of a numeric column.


1:PIVOT | Databricks on AWS

2:Reshaping Data - Long vs Wide Format | Databricks on AWS

3:CONVERT | Databricks on AWS

4:WHERE | Databricks on AWS

5:TRANSFORM | Databricks on AWS

: [SUM | Databricks on AWS]

by Rikki at Aug 02, 2024, 02:34 PM

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Brice
10 months ago
I'm not sure, but I think A) PIVOT is commonly used for converting tables.
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Roxanne
10 months ago
Wait, is the answer 'SUM'? I'm just kidding, PIVOT is clearly the way to go.
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Van
10 months ago
PIVOT? More like PIVOTAL for this question! *chuckles*
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Corrinne
10 months ago
My money's on PIVOT. That's the one I remember learning about for this kind of data manipulation.
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Mitsue
9 months ago
Yes, PIVOT is the correct keyword for converting a table from long to wide format.
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Deja
10 months ago
I agree, PIVOT is the one we should use for this type of data transformation.
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Eden
10 months ago
I think you're right, PIVOT is the keyword used for converting from long to wide format.
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Marylou
10 months ago
I believe A) PIVOT is the correct keyword for this task.
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Scarlet
11 months ago
Hmm, TRANSFORM sounds like it could be the answer, but I think PIVOT is the more specific keyword for this task.
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Carlota
10 months ago
Yes, PIVOT is the keyword used to convert a table from long to wide format.
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Willow
10 months ago
TRANSFORM might sound like it, but PIVOT is the correct keyword.
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Joni
10 months ago
I agree, PIVOT is the specific keyword used for this task.
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Charlette
10 months ago
I think PIVOT is the right keyword for converting a table from long to wide format.
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Lennie
11 months ago
CONVERT? Really? That's more for data type conversion, not reshaping the data structure. I'll go with PIVOT.
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Jess
11 months ago
I'm pretty sure the answer is PIVOT. That's the SQL keyword for transforming data from long to wide format.
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Nobuko
10 months ago
Yes, PIVOT is the keyword for converting data from long to wide format.
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Daron
10 months ago
I think you're right, PIVOT is used for that transformation.
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Louvenia
11 months ago
I think D) TRANSFORM might also work.
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Arlette
11 months ago
A) PIVOT can be used for that.
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