Oracle SQL Code

SeTech used Ask the Experts™
I generally use Microsoft SQL, however I have recently had to access and Oracle Server and have been given some code to run. The code contains many || ( two vertical parallel lines). Can someone please educate me on their meaning/usage? Thanks
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Software Team Lead
in short it's joining the chars
johnsoneSenior Oracle DBA

That is a string concatenation operator.

The documentation is your friend ->

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