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Question 636 - COF-C02 discussion

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Which function determines the kind of value stored in a VARIANT column?

A.
CHECK_JSON
Answers
A.
CHECK_JSON
B.
IS_ARRAY
Answers
B.
IS_ARRAY
C.
IS_JSON
Answers
C.
IS_JSON
D.
TYPEOF
Answers
D.
TYPEOF
Suggested answer: D

Explanation:

The function used to determine the kind of value stored in a VARIANT column in Snowflake is TYPEOF.

Understanding VARIANT Data Type:

VARIANT is a flexible data type in Snowflake that can store semi-structured data, such as JSON, Avro, and XML.

This data type can hold values of different types, including strings, numbers, objects, arrays, and more.

Using TYPEOF Function:

The TYPEOF function returns the data type of the value stored in a VARIANT column.

It helps in identifying the type of data, which is crucial for processing and transforming semi-structured data accurately.

Example Usage:

SELECT TYPEOF(variant_column)

FROM my_table;

This query retrieves the type of data stored in variant_column for each row in my_table.

Possible return values include 'OBJECT', 'ARRAY', 'STRING', 'NUMBER', etc.

Benefits:

Simplifies data processing: Knowing the data type helps in applying appropriate transformations and validations.

Enhances query accuracy: Ensures that operations on VARIANT columns are performed correctly based on the data type.

References:

Snowflake Documentation: TYPEOF

Snowflake Documentation: VARIANT Data Type

asked 23/09/2024
Tommy Basnes
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