<s>
Strozzi	B-Application
NoSQL	I-Application
is	O
a	O
shell-based	O
relational	B-Application
database	I-Application
management	I-Application
system	I-Application
initialized	O
and	O
developed	O
by	O
Carlo	O
Strozzi	O
that	O
runs	O
under	O
Unix-like	O
operating	O
systems	O
,	O
or	O
others	O
with	O
compatibility	O
layers	O
(	O
e.g.	O
,	O
Cygwin	B-Language
under	O
Windows	O
)	O
.	O
</s>
<s>
Its	O
file	O
name	O
NoSQL	B-General_Concept
merely	O
reflects	O
the	O
fact	O
that	O
it	O
does	O
not	O
express	O
its	O
queries	O
using	O
Structured	B-Language
Query	I-Language
Language	I-Language
;	O
the	O
NoSQL	B-General_Concept
RDBMS	B-Application
is	O
distinct	O
from	O
the	O
circa-2009	O
general	O
concept	O
of	O
NoSQL	B-General_Concept
databases	I-General_Concept
,	O
which	O
are	O
typically	O
non-relational	O
,	O
unlike	O
the	O
NoSQL	B-General_Concept
RDBMS	B-Application
.	O
</s>
<s>
Strozzi	B-Application
NoSQL	I-Application
is	O
released	O
under	O
the	O
GNU	B-License
GPL	I-License
.	O
</s>
<s>
NoSQL	B-General_Concept
uses	O
the	O
operator-stream	O
paradigm	O
,	O
where	O
a	O
number	O
of	O
"	O
operators	O
"	O
perform	O
a	O
unique	O
function	O
on	O
the	O
passed	O
data	O
.	O
</s>
<s>
The	O
stream	O
used	O
is	O
supplied	O
by	O
the	O
UNIX	B-Application
input/output	O
redirection	O
system	O
so	O
that	O
over	O
the	O
pipe	B-Operating_System
system	O
,	O
the	O
result	O
of	O
the	O
calculation	O
can	O
be	O
passed	O
to	O
other	O
operators	O
.	O
</s>
<s>
As	O
UNIX	B-Operating_System
pipes	I-Operating_System
run	O
in	O
memory	O
,	O
it	O
is	O
a	O
very	O
efficient	O
way	O
of	O
implementation	O
.	O
</s>
<s>
NoSQL	B-General_Concept
,	O
with	O
development	O
led	O
by	O
Carlo	O
Strozzi	O
,	O
is	O
the	O
latest	O
and	O
perhaps	O
the	O
most	O
active	O
in	O
a	O
line	O
of	O
implementations	O
of	O
the	O
stream-operator	O
database	O
design	O
originally	O
described	O
by	O
Evan	O
Shaffer	O
,	O
Rod	O
Manis	O
,	O
and	O
Robert	O
Jorgensen	O
in	O
a	O
1991	O
Unix	B-Application
Review	O
article	O
and	O
an	O
.	O
</s>
<s>
Other	O
implementations	O
include	O
the	O
Perl-based	O
,	O
a	O
commercial	O
version	O
by	O
the	O
original	O
authors	O
called	O
,	O
and	O
,	O
a	O
version	O
with	O
added	O
astronomical	O
data	O
operators	O
by	O
John	O
Roll	O
of	O
Harvard	O
and	O
the	O
Smithsonian	O
Astrophysical	O
Observatory	O
.	O
</s>
<s>
Because	O
of	O
its	O
strengths	O
in	O
dealing	O
with	O
pipe	B-Operating_System
data	O
,	O
most	O
implementations	O
are	O
a	O
mixture	O
of	O
awk	B-Application
and	O
other	O
programming	O
languages	O
,	O
usually	O
C	O
or	O
Perl	B-Language
.	O
</s>
<s>
The	O
concept	O
was	O
originally	O
described	O
in	O
a	O
1991	O
Unix	B-Application
Review	O
article	O
,	O
and	O
later	O
expanded	O
in	O
a	O
paper	O
(	O
see	O
reference	O
above	O
)	O
,	O
as	O
well	O
as	O
in	O
the	O
book	O
,	O
"	O
Unix	B-Application
Relational	O
Database	O
Management	O
"	O
.	O
</s>
<s>
NoSQL	B-General_Concept
(	O
along	O
with	O
other	O
similar	O
stream-operator	O
databases	O
)	O
is	O
well-suited	O
to	O
a	O
number	O
of	O
fast	O
,	O
analytical	O
database	O
tasks	O
,	O
and	O
has	O
the	O
significant	O
advantage	O
of	O
keeping	O
the	O
tables	O
in	O
ASCII	O
text	O
form	O
,	O
allowing	O
many	O
powerful	O
text	O
processing	O
tools	O
to	O
be	O
used	O
as	O
an	O
adjunct	O
to	O
the	O
database	O
functions	O
themselves	O
.	O
</s>
<s>
Popular	O
tools	O
for	O
use	O
with	O
NoSQL	B-General_Concept
include	O
Python	O
,	O
Perl	B-Language
,	O
awk	B-Application
,	O
and	O
shell	B-Operating_System
scripts	O
using	O
the	O
ubiquitous	O
Unix	B-Application
text	O
processing	O
tools	O
(	O
cut	O
,	O
paste	O
,	O
grep	O
,	O
sort	O
,	O
uniq	O
,	O
etc	O
.	O
)	O
</s>
<s>
NoSQL	B-General_Concept
is	O
written	O
mostly	O
in	O
interpretive	O
languages	O
,	O
slowing	O
actual	O
process	O
execution	O
,	O
but	O
its	O
ability	O
to	O
use	O
ordinary	O
pipes	B-Operating_System
and	O
filesystems	O
means	O
that	O
it	O
can	O
be	O
extremely	O
fast	O
for	O
many	O
applications	O
when	O
using	O
RAM	O
filesystems	O
or	O
heavily	O
leveraging	O
pipes	B-Operating_System
,	O
which	O
are	O
mostly	O
memory-based	O
in	O
many	O
implementations	O
.	O
</s>
<s>
The	O
reasons	O
for	O
avoiding	O
SQL	B-Language
are	O
as	O
follows	O
:	O
</s>
<s>
They	O
also	O
do	O
not	O
have	O
the	O
shell-level	O
approach	O
that	O
NoSQL	B-General_Concept
has	O
.	O
</s>
<s>
Data	O
:	O
The	O
data	O
from	O
NoSQL	B-General_Concept
can	O
be	O
easily	O
ported	O
to	O
other	O
types	O
of	O
machines	O
,	O
like	O
Macintoshes	B-Device
or	O
Windows	B-Application
computers	I-Application
,	O
since	O
tables	O
exist	O
as	O
simple	O
ASCII	O
text	O
and	O
can	O
be	O
easily	O
read	O
from	O
or	O
redirected	O
to	O
files	O
at	O
any	O
point	O
in	O
processing	O
.	O
</s>
<s>
Software	O
:	O
NoSQL	B-General_Concept
can	O
run	O
on	O
any	O
UNIX	B-Application
machine	O
that	O
has	O
the	O
Perl	B-Language
and	O
the	O
AWK	B-Application
programming	I-Application
languages	I-Application
installed	O
,	O
and	O
perhaps	O
even	O
on	O
the	O
Cygwin	B-Language
UNIX-like	O
environment	O
for	O
Microsoft	B-Application
Windows	I-Application
.	O
</s>
<s>
Unlimited	O
:	O
NoSQL	B-General_Concept
has	O
no	O
arbitrary	O
limits	O
,	O
like	O
a	O
data	O
field	O
size	O
,	O
column	O
number	O
,	O
or	O
file	O
size	O
limit	O
,	O
and	O
can	O
principally	O
work	O
where	O
other	O
products	O
cannot	O
.	O
</s>
<s>
Usability	O
:	O
With	O
its	O
straight	O
forward	O
and	O
logical	O
concept	O
,	O
NoSQL	B-General_Concept
can	O
easily	O
be	O
used	O
by	O
non-computer	O
people	O
.	O
</s>
<s>
In	O
contrast	O
to	O
other	O
RDBMS	B-Application
,	O
NoSQL	B-General_Concept
has	O
the	O
full	O
power	O
of	O
UNIX	B-Application
during	O
application	O
development	O
and	O
usage	O
.	O
</s>
<s>
Its	O
user	O
interface	O
uses	O
the	O
UNIX	B-Application
shell	B-Operating_System
.	O
</s>
<s>
From	O
the	O
view	O
of	O
NoSQL	B-General_Concept
,	O
the	O
database	O
is	O
not	O
more	O
than	O
a	O
set	O
of	O
files	O
similar	O
to	O
any	O
other	O
user	O
file	O
.	O
</s>
<s>
No	O
scripting	O
or	O
other	O
type	O
of	O
database	O
language	O
is	O
used	O
besides	O
the	O
UNIX	B-Application
shell	B-Operating_System
.	O
</s>
<s>
This	O
shell-nature	O
encourages	O
casual	O
use	O
of	O
this	O
database	O
,	O
which	O
makes	O
its	O
use	O
familiar	O
,	O
resulting	O
in	O
formal	O
use	O
.	O
</s>
<s>
In	O
other	O
words	O
,	O
NoSQL	B-General_Concept
is	O
a	O
set	O
of	O
shell	B-Operating_System
routines	O
that	O
access	O
normal	O
files	O
of	O
the	O
operating	O
system	O
.	O
</s>
<s>
To	O
retrieve	O
information	O
about	O
a	O
particular	O
employee	O
,	O
a	O
query	O
in	O
SQL	B-Language
might	O
look	O
like	O
this	O
:	O
</s>
<s>
Since	O
a	O
document-oriented	O
NoSQL	B-General_Concept
database	O
often	O
retrieves	O
a	O
pre-connected	O
document	O
representing	O
the	O
entire	O
employee	O
,	O
the	O
query	O
might	O
look	O
like	O
this	O
:	O
</s>
<s>
The	O
stream-operator	O
paradigm	O
differs	O
from	O
conventional	O
SQL	B-Language
,	O
but	O
since	O
the	O
NoSQL	B-General_Concept
DB	O
is	O
relational	O
,	O
it	O
is	O
possible	O
to	O
map	O
NoSQL	B-General_Concept
operators	O
to	O
their	O
SQL	B-Language
equivalents	O
:	O
</s>
