--!sql
-- Cast Functions and Operators
-- Funkcje i operatory do konwersji typów
-- http://dev.mysql.com/doc/refman/5.0/en/cast-functions.html
 
 
SELECT CAST(`customer_id` AS CHAR) FROM `cutomer`;
 
 
-- BINARY[(N)]
-- CHAR[(N)]
-- DATE
-- DATETIME
-- DECIMAL[(M[,D])]
-- SIGNED [INTEGER]
-- TIME
-- UNSIGNED [INTEGER]