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MySQL | FROM_BASE64 method

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String
schedule Jul 1, 2022
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MySQL's FROM_BASE64(~) method decodes a base64 encoded string and returns the resulting binary string.

NOTE

base64 is a method to encode binary data using ASCII characters. As ASCII characters are available in most character sets, this means there is a low chance of data corruption. Each base64 digit represents 6 bits of data. Therefore, 3 bytes (24 bits) can be represented using 4 base64 digits.

There are a few rules followed by FROM_BASE64(~):

  • Encoding for alphabet value 62 is '+'

  • Encoding for alphabet value 63 is '/'

  • Newlines, carriage returns, tabs and spaces are ignored when decoding.

Parameters

1. str | string

The base64 encoded string to be decoded to a binary string.

Examples

Basic usage

To decode the base64 string 'QXBwbGU=':

SELECT FROM_BASE64('QXBwbGU=');
+---------------------------+
| FROM_BASE64('QXBwbGU=') |
+---------------------------+
| Apple |
+---------------------------+

NULL argument

If the input is NULL, NULL is returned:

SELECT FROM_BASE64(NULL);
+-------------------+
| FROM_BASE64(NULL) |
+-------------------+
| NULL |
+-------------------+
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Published by Arthur Yanagisawa
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