I'm a DBA and Database developer [ a bit schizo I know ]
Have been for 12 years.
You will always have a job if you focus on the key skills.
you will learn a lot of different skills.
Oracle database , Oracle Forms, Oracle E-Business have been in demand for years and show no signs of slowing down.
Java is fully mainstream now and there is a dearth of good, experienced people.
Also, strong SQL*Server +
VB.NET and legacy VB6 is still a winner
and for niche government work and banks DB2 [ mainframe or small system ]
There is NO useful Oracle Cert - OCA,OCP,OCM are only regarded as licences to learn. Experience counts more than anything - so if you get a sniff of Oracle chase it.
Regards