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Applies to: 
Databricks SQL Databricks Runtime
Returns a formatted string from printf-style format strings.
The function exploits the java.util.Formatter class with Locale.US.
For details, see java.util.Formatter.
format_string(strfmt [, obj1 [, ...] ])
strfmt: ASTRINGexpression.objN:STRINGor numeric expressions.
A STRING.
> SELECT format_string('Hello World %d %s', 100, 'days');
Hello World 100 days