Mirror of <https://developer.salesforce.com/docs/data/data-cloud-query-guide/references/dc-sql-reference/nvl.html> (Salesforce, Data 360 Query Guide), read 2026-10-23. Salesforce's own page is the authority; this copy exists because that site refuses non-browser readers.

NVL and IFNULL

Applies to: ✅ Data 360 SQL ✅ Tableau Hyper API

IFNULL and NVL both return a replacement expression when the input expression is NULL.

• <expr>: Expression to check for NULL.
• <replacement>: Expression returned when <expr> is NULL.

Returns <expr> when it isn’t NULL; otherwise, returns <replacement>. Argument types must be compatible.

• Requires exactly two arguments.
• IFNULL is an alias of NVL.
• Equivalent to COALESCE with these two arguments.

Return the replacement when the first expression is NULL.

Returns 99.

IFNULL returns the same result:

Returns 99.

Return the first expression when it isn’t NULL.

Returns 42.

• COALESCE
• NULLIFZERO
• ZEROIFNULL

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