db2 for dummies

Conect to database


Show Tables

list tables

describe table

describe table <tablename>

Size of your database:

db2 'call get_dbsize_info(?,?,?,0)'

Version of DB2 you are running:


Stop the db2 instance


Stop an instance that has current connections

=>db2 force applications all
=>db2 deactivate db <dbname>
=>db2 terminate
=>db2stop force

Start the db2 instance


Kill a hung instance (last resort)

=>db2_kill -all

List the databases in an instance

=>db2 list db directory

List schemas

select schemaname from syscat.schemata

List the cataloged nodes

=>db2 list node directory

Show the database manager configuration settings =>db2 get dbm cfg Show the database level configuration settings =>db2 get db cfg for Activate a database =>db2 activate db Deactivate a database =>db2 deactivate db View the DB2 License =>db2licm -l To switch between partitions =>db2 terminate; export DB2NODE=

Restart a DB2 DPF system


db2stop force 
db2_all "ipclean -a"


b2start admin mode user restricted access db2_all "<<+0< db2 restart db DBNAME"
db2_all "<<-0<||db2 restart db DBNAME" db2 -v "unquiesce instance INSTNAME"
db2 "activate db DBNAME"


  1. db2_all "db2 connect to DBNAME; db2 values current node; db2 terminate"
  2. db2 "get snapshot for database manager" => should show all nodes are active

Drop a Db

db2 connect to <DB>
db2 force applications all
db2 drop database <DB>
db2 list database directory