2 or more transactions in one connection

[Björn Lorenz]

Hi everyone, 

for the java-appIication, I am working on, I use mysql2.0.14 to connect to mysql(3.23.53)
with innoDB tables.
Wanting to ensure concurrency and consistency, I wonder what happens if there are two
transactions "running" on one connection and then one transaction is comitted before the
other transaction has finished. Is the other one committed also? Or are there any
transactionIDs (or anything else) to identify the transactions?

Thx for all help,

bjoern