coalesce()

Learn how to use the coalesce() function to evaluate a list of expressions to return the first non-null expression.

Evaluates a list of expressions and returns the first non-null (or non-empty for string) expression.

Syntax

coalesce(arg,arg_2,[arg_3,...])

Parameters

NameTypeRequiredDescription
argscalar✔️The expression to be evaluated.

Returns

The value of the first arg whose value isn’t null (or not-empty for string expressions).

Example

print result=coalesce(tolong("not a number"), tolong("42"), 33)

Output

result
42