ReferenceSQL language referenceFunctionsBuilt-in functionsAlphabetical list of built-in functionsunbase64 functionOn this pageunbase64 function Applies to: Databricks SQL Databricks Runtime Returns a decoded base64 string as binary. Syntax unbase64(expr) Arguments expr: A STRING expression in a base64 format. Returns A BINARY. Examples SQL> SELECT cast(unbase64('U3BhcmsgU1FM') AS STRING); Spark SQL Related functions base64 function