--Define a terminator character
--#SET TERMINATOR @

--List all databases (aliases)
LIST DB DIRECTORY

--Connect to a database (alias)
CONNECT TO mydb

--Disconnect from a database
CONNECT RESET
TERMINATE

--Get values from the environment (registry values)
-- Current timestamp
VALUES CURRENT TIMESTAMP

-- Connected user
VALUES CURRENT USER

-- Current database
VALUES CURRENT SERVER

--Change current schema
SET CURRENT SCHEMA otherschema

--Change the isolation level
SET ISOLATION RR

--Get help for a Db2 command
? command

--Get help for a SQL code (SQLXXXX) or SQLstate (YYYYY)
? SQLXXX
? YYYYY