On 27 June 2011 13:59, Frank Lanitz <frank@frank.uvena.de> wrote:
> Hi list,
>
> I've got an query which contains || inside the select statement and I'm
> not sure, what this is doing. Can you help me out a bit or send me a
> link to documentation where I can find this?
>
> Example:
>
> SELECT 'ba_'|| foo || '_pr_'
> FROM 'foobaa'
> WHERE id=1234;
|| in PostgreSQL is a concatenation operator. It's equivalent to + in
Microsoft SQL Server, or concat() in MySQL.
So if foo = 'hello', the output of that select would be 'ba_hello_pr_'
See http://www.postgresql.org/docs/current/static/functions-string.html
Regards
Thom Brown
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