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Question 699 - COF-C02 discussion

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When unloading data, which combination of parameters should be used to differentiate between empty strings and NULL values? (Select TWO).

A.

ESCAPE_UNENCLOSED_FIELD

Answers
A.

ESCAPE_UNENCLOSED_FIELD

B.

REPLACE_INVALID_CHARACTERS

Answers
B.

REPLACE_INVALID_CHARACTERS

C.

FIELD_OPTIONALLY_ENCLOSED_BY

Answers
C.

FIELD_OPTIONALLY_ENCLOSED_BY

D.

EMPTY_FIELD_AS_NULL

Answers
D.

EMPTY_FIELD_AS_NULL

E.

SKIP_BLANK_LINES

Answers
E.

SKIP_BLANK_LINES

Suggested answer: C, D

Explanation:

When unloading data in Snowflake, it is essential to differentiate between empty strings and NULL values to preserve data integrity. The parameters FIELD_OPTIONALLY_ENCLOSED_BY and EMPTY_FIELD_AS_NULL are used together to address this:

FIELD_OPTIONALLY_ENCLOSED_BY: This parameter specifies the character used to enclose fields, which can differentiate between empty strings (as enclosed fields) and NULLs.

EMPTY_FIELD_AS_NULL: By setting this parameter, Snowflake interprets empty fields as NULL values when unloading data, ensuring accurate representation of NULLs versus empty strings.

These parameters are crucial when exporting data for systems that need explicit differentiation between NULL and empty string values.

asked 12/11/2024
Aleph Ventures
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