compound Bash if then statement question

Shell Programming and Scripting
1

I am writing a Bash script that will either clone a database or setup a standby database. So Parameter 2 will be the operation type. If the value is not clone or standby I want to throw an error message. I suppose I can also do a case block. So far i have been unable to get the syntax working properly. Here is what I have, any help would be appreciated.

Thanks,

Brian

By the way, the script would run under any one of the following systems, Solaris 8, 10, or Redhat 2.6.

if [ $OPERATIONTYPE != "clone" && $OPERATIONTYPE != "standby"] ; then

2 
case $OPERATIONTYPE in
  clone )
    do something;;
  standby )
    do something else;;
  ? )
    throw error;;
esac