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MySQL | TO_BASE64 method

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String
schedule Mar 9, 2022
Last updated
local_offer MySQL
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MySQL's TO_BASE64(~) method converts the input string to base64 and returns it as a character 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 TO_BASE64(~):

  • Encoding for alphabet value 62 is '+'

  • Encoding for alphabet value 63 is '/'

  • Output is in groups of 4 printable characters. If the last group is incomplete, it will be padded with '=' character.

  • Newline is added after every 76 characters of encoded output.

Parameters

1. str | string

The string to be converted to base64.

Return value

A character string of the input string converted to base64.

Examples

Basic usage

To convert 'Apple' to a base64 encoded string:

SELECT TO_BASE64('Apple');
+--------------------+
| TO_BASE64('Apple') |
+--------------------+
| QXBwbGU= |
+--------------------+

Numeric argument

Non-string arguments are automatically converted to a string first before conversion to base64:

SELECT TO_BASE64(30), TO_BASE64('30');
+---------------+-----------------+
| TO_BASE64(30) | TO_BASE64('30') |
+---------------+-----------------+
| MzA= | MzA= |
+---------------+-----------------+

Note that the returned base64 string is the same whether we provide 30 or '30' as input.

NULL argument

NULL argument returns NULL:

SELECT TO_BASE64(NULL);
+-----------------+
| TO_BASE64(NULL) |
+-----------------+
| NULL |
+-----------------+
robocat
Published by Arthur Yanagisawa
Edited by 0 others
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