how to make a Batch file that runs all my listed commands

I have made a batch file to run one command on my database. when I click on it, its working fine.

Command-

start db2cmd.exe "db2 coect to QATEST"

But after adding one another command in my batch file it is giving me error.

command-

start db2cmd.exe "db2 coect to QATEST" "db2 select * from db2admin.table_a"

How to do it? can anybody help me in this?