How to access Multiple DB2 Relational Databases In A Single Query

I am looking for a solution to the problem described below. There are two DB2 instances with two authorization IDs on the same server and can be accessed using the same user User1. **Example:** To access Inst1DB, I use the following commands: [User1 ~]$ . /db2/authID1db2/home/authID1db2/sqllib/db2profile [User1 ~]$ db2 connect to Inst1DB To access Inst2DB, run the following commands: [User1 ~]$ . /db2/auth2db2/home/auth2db2/sqllib/db2profile [User1 ~]$ db2 connect to Inst2DB Note that one needs to terminate the current DB2 session before connecting to another DB instance. To terminate DB session, run the following command: [User1 ~]$ db2 terminate **Issue:** I want to join two tables, one of which belongs to INST1DB and the other to INST2DB, while connected to INST1DB. [User1 ~]$ . /db2/authID1db2/home/authID1db2/sqllib/db2profile [User1 ~]$ db2 connect to Inst1DB [User1 ~]$ db2 "Select * from Inst1DB.schema1.table1 T1 , Inst2DB.schema2.table2 T2 where T1.column1 = T2.column1. Curerntly I am getting below error: >SQL0204N "Inst2DB.schema2.table2" is an undefined name. SQLSTATE=42704. **Query:** Can anyone suggest to me how to connect the two instances and perform a join on these tables?