<s>
A	O
statistical	B-Algorithm
database	I-Algorithm
is	O
a	O
database	O
used	O
for	O
statistical	O
analysis	O
purposes	O
.	O
</s>
<s>
It	O
is	O
an	O
OLAP	B-Application
(	O
online	B-Application
analytical	I-Application
processing	I-Application
)	O
,	O
instead	O
of	O
OLTP	B-General_Concept
(	O
online	B-General_Concept
transaction	I-General_Concept
processing	I-General_Concept
)	O
system	O
.	O
</s>
<s>
Modern	O
decision	O
,	O
and	O
classical	O
statistical	B-Algorithm
databases	I-Algorithm
are	O
often	O
closer	O
to	O
the	O
relational	B-Architecture
model	I-Architecture
than	O
the	O
multidimensional	O
model	O
commonly	O
used	O
in	O
OLAP	B-Application
systems	O
today	O
.	O
</s>
<s>
Statistical	B-Algorithm
databases	I-Algorithm
typically	O
contain	O
parameter	O
data	O
and	O
the	O
measured	O
data	O
for	O
these	O
parameters	O
.	O
</s>
<s>
Many	O
statistical	B-Algorithm
databases	I-Algorithm
are	O
sparse	O
with	O
many	O
null	O
or	O
zero	O
values	O
.	O
</s>
<s>
It	O
is	O
not	O
uncommon	O
for	O
a	O
statistical	B-Algorithm
database	I-Algorithm
to	O
be	O
40%	O
to	O
50%	O
sparse	O
.	O
</s>
<s>
Statistical	B-Algorithm
databases	I-Algorithm
often	O
incorporate	O
support	O
for	O
advanced	O
statistical	O
analysis	O
techniques	O
,	O
such	O
as	O
correlations	O
,	O
which	O
go	O
beyond	O
SQL	B-Language
.	O
</s>
<s>
In	O
a	O
statistical	B-Algorithm
database	I-Algorithm
,	O
it	O
is	O
often	O
desired	O
to	O
allow	O
query	O
access	O
only	O
to	O
aggregate	O
data	O
,	O
not	O
individual	O
records	O
.	O
</s>
<s>
The	O
conclusion	O
is	O
that	O
statistical	B-Algorithm
databases	I-Algorithm
are	O
almost	O
always	O
subject	O
to	O
compromise	O
.	O
</s>
<s>
While	O
showing	O
that	O
some	O
semantic	O
security	O
goals	O
,	O
related	O
to	O
work	O
of	O
Tore	O
Dalenius	O
,	O
were	O
impossible	O
,	O
it	O
identified	O
new	O
techniques	O
for	O
limiting	O
the	O
increased	O
privacy	O
risk	O
resulting	O
from	O
inclusion	O
of	O
private	O
data	O
in	O
a	O
statistical	B-Algorithm
database	I-Algorithm
.	O
</s>
<s>
-	O
Dorothy	O
E	O
.	O
Denning	O
,	O
Jan	O
Schlörer	O
,	O
A	O
fast	O
procedure	O
for	O
finding	O
a	O
tracker	O
in	O
a	O
statistical	B-Algorithm
database	I-Algorithm
,	O
ACM	O
Transactions	O
on	O
Database	O
Systems	O
,	O
Volume	O
5	O
,	O
Issue	O
1	O
(	O
March	O
1980	O
)	O
.	O
</s>
<s>
A	O
.	O
Shoshani	O
,	O
“	O
Statistical	B-Algorithm
Databases	I-Algorithm
:	O
Characteristics	O
,	O
Problems	O
,	O
and	O
some	O
Solutions	O
,	O
”	O
in	O
Proceedings	O
of	O
the	O
8th	O
International	O
Conference	O
on	O
Very	O
Large	O
Data	O
Bases	O
,	O
San	O
Francisco	O
,	O
CA	O
,	O
USA	O
,	O
1982	O
,	O
pp.208	O
–	O
222	O
.	O
</s>
