<s>
A	O
Pseudocolumn	B-General_Concept
is	O
a	O
"	O
column	O
"	O
that	O
yields	O
a	O
value	O
when	O
selected	O
,	O
but	O
which	O
is	O
not	O
an	O
actual	O
column	O
of	O
the	O
table	O
.	O
</s>
<s>
It	O
is	O
often	O
used	O
in	O
combination	O
with	O
the	O
DUAL	B-Application
table	I-Application
.	O
</s>
