BTEQ supports a maximum of 200 sessions. Specify the number of sessions in a set by entering the SESSIONS command prior to the LOGON command. The default number of sessions is 1. (See SESSIONS for more details.)
At the BTEQ prompt:
Teradata BTEQ <version> for <OS>. Enter your logon or BTEQ command.
.SET SESSIONS n
where n is the number of sessions.