<s>
A	O
range	B-General_Concept
query	I-General_Concept
is	O
a	O
common	O
database	O
operation	O
that	O
retrieves	O
all	O
records	O
where	O
some	O
value	O
is	O
between	O
an	O
upper	O
and	O
lower	O
boundary	O
.	O
</s>
<s>
Range	B-General_Concept
queries	I-General_Concept
are	O
unusual	O
because	O
it	O
is	O
not	O
generally	O
known	O
in	O
advance	O
how	O
many	O
entries	O
a	O
range	B-General_Concept
query	I-General_Concept
will	O
return	O
,	O
or	O
if	O
it	O
will	O
return	O
any	O
at	O
all	O
.	O
</s>
