JSON functions were added in MariaDB 10.2.3.
 
Syntax
------ 
JSON_UNQUOTE(val)
 
Description
----------- 
Unquotes a JSON value, returning a string, or NULL if the
argument is null. 
 
An error will occur if the given value begins and ends with
double quotes and is an invalid JSON string literal.
 
Certain character sequences have special meanings within a
string. Usually, a backspace is ignored, but the escape
sequences in the table below are recognised by MariaDB,
unless the SQL Mode is set to NO_BACKSLASH_ESCAPES SQL.
 
Escape sequence | Character | 
 
\" | Double quote (") | 
 
\b | Backspace | 
 
\f | Formfeed | 
 
\n | Newline (linefeed) | 
 
\r | Carriage return | 
 
\t | Tab | 
 
\\ | Backslash (\) | 
 
\uXXXX | UTF-8 bytes for Unicode value XXXX | 
 
Examples
-------- 
SELECT JSON_UNQUOTE('"Monty"');
+-------------------------+
| JSON_UNQUOTE('"Monty"') |
+-------------------------+
| Monty |
+-------------------------+
 
With the default SQL Mode:
 
SELECT JSON_UNQUOTE('Si\bng\ting');
+-----------------------------+
| JSON_UNQUOTE('Si\bng\ting') |
+-----------------------------+
| Sng ing |
+-----------------------------+
 
Setting NO_BACKSLASH_ESCAPES:
 
 
SELECT JSON_UNQUOTE('Si\bng\ting');
+-----------------------------+
| JSON_UNQUOTE('Si\bng\ting') |
+-----------------------------+
| Si\bng\ting |
+-----------------------------+
 

 
 
 
 
 
 
 

URL: https://mariadb.com/kb/en/json_unquote/