Abstract: The following document is for IBM DB2 for z/OS, Topic is Global variables. Asa DB2 DBA administrator every one should have strong knowledge on how to create the objects, its significance and how to maintain them. Global variable is the new kind of object which is introduced in DB2 11. In this paper will give clear idea of global variables, how to create them, how to maintain them, and its significance. This paper can also be used by application programmers to have a knowledge on new DB2 object and its application. This paper is mainly applicable to DB2 versions 11 and 12.