Need to use another file in script

hi everyone, i making script in KSH AIX server i n which i am calling sql connection, i want password and username stored in another directory and in my script it looks like

sqlpus -s $username/$password @eod.sql

and my username and password stored in file databaseconnection like this
username=s456
password=welcome

please let me know how i can assign these username and password variable in my script variable which is also username and password.

You need to source your dbconenction file in your script.like below

. /path/databaseconnection
sqlpus -s $username/$password @eod.sql

thanks parveen , i did but it is working,

thanks a lot