sql - What is the task of this oracle operator -

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sql - What is the task of this oracle operator -

create or replace view v_dim_prcprojectsppmse select 'project' parent, 'prjcate_' || listitemid child, ... myview

what operator '||' above mean , how named?

|| string concatenation. in c# + in vb &.

'aaa' || 'bbb' ==> 'aaabbb'

sql oracle

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