BASE64 - MaxCompute - Alibaba Cloud Documentation Center

Converts a binary value into a Base64-encoded string.

Syntax

string base64(binary <value>)

value: required. A value of the BINARY type. This parameter specifies the value that you want to convert.

A value of the STRING type is returned. If the input parameter is set to null, null is returned.

Example 1: Convert the binary result of cast ('alibaba' as binary) into a Base64-encoded string. Sample statement:
```
-- The return value is YWxpYmFiYQ==. 
select base64(cast ('alibaba' as binary));
```
Example 2: The input parameter is set to null. Sample statement:
```
-- The return value is null. 
select base64(null);
```

For more information, see Other functions.