MD5 - MaxCompute - Alibaba Cloud Documentation Center

Returns the MD5 value of a string specified by str.

Syntax

string md5(string <str>)

Parameters

str: required. A value of the STRING type. If the input value is of the BIGINT, DOUBLE, DECIMAL, or DATETIME type, the value is implicitly converted into a value of the STRING type before calculation.

Return value

A value of the STRING type is returned. The return value varies based on the following rules:

If the value of str is not of the STRING, BIGINT, DOUBLE, DECIMAL, or DATETIME type, an error is returned.
If the value of str is null, null is returned.

Examples

Example 1: Return the MD5 value of the string Tech on the net. Sample statement:

-- The return value is ddc4c4796880633333d77a60fcda9af6. 
select md5('Tech on the net');

Example 2: An input parameter is set to null. Sample statement:
```
-- The return value is null. 
select md5(null);
```

Related functions

MD5 is a string function. For more information about functions related to string searches and conversion, see String functions.