1. MySQL concat() function
Reference :-
http://www.w3resource.com/mysql/string-functions/mysql-concat-function.php
http://dev.mysql.com/doc/refman/5.0/en/string-functions.html#function_concat

2. MySQL concat() function
Description
MySQL CONCAT() function is used to add two
or more strings. It will return non-binary
strings when all the strings are non-binary and
return binary string when any of the specified
string is binary. A numeric argument is also
converted in its equivalent binary string form.
It can be avoided by using an explicit type CAST
Syntax
CONCAT (string1, string2,…)

3. MySQL concat() function
Example of MySQL concat() function
Code:-
SELECT CONCAT('Use',' MySQL');

4. MySQL concat() function
Example of MySQL concat() function on columns
Code:-
SELECT CONCAT(pub_city,'--> ',country)
FROM publisher;