04-28-2010
The first one looks like you're telling the database to load the file.
The second one is feeding it select statements right from a here document in the shell script.
The third one is telling it the file to load right from the commandline.
None of these are going to be important to the speed of the query, 99% of the work is happening inside the database and not in the shell. Where the shell script resides makes little difference to the speed of execution either (unless you have a really slow disk or NFS link lurking on your system somewhere.) The third would probably be microscopically fastest since the shell needs to do the least amount of work to do it.
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