<s>
Object-PL/SQL	B-Application
(	O
Object-Procedural	O
Language/Structured	O
Query	O
Language	O
or	O
simply	O
O-PL/SQL	B-Application
)	O
is	O
a	O
methodology	O
of	O
using	O
the	B-Application
Oracle	I-Application
Corporation	I-Application
's	O
procedural	B-Application
extension	O
language	O
for	O
SQL	B-Language
and	O
the	O
Oracle	B-General_Concept
relational	I-General_Concept
database	I-General_Concept
.	O
</s>
<s>
The	O
additional	O
features	O
from	O
version	O
7	O
and	O
other	O
improvements	O
,	O
lead	O
to	O
one	O
of	O
the	O
large-scale	O
environment	O
implementations	O
of	O
the	O
object-oriented	B-Application
database	I-Application
paradigm	O
.	O
</s>
<s>
Although	O
PL/SQL	B-Language
'	O
s	O
general	O
syntax	O
formerly	O
used	O
to	O
resemble	O
that	O
of	O
Ada	B-Language
or	O
Pascal	B-Application
,	O
there	O
were	O
many	O
improvements	O
that	O
mainly	O
include	O
the	O
Java	B-Language
embedding	O
code	O
and	O
the	O
object-oriented	B-Language
syntax	O
inside	O
the	O
SQL	B-Language
.	O
</s>
<s>
The	O
mixing	O
and	O
embedding	O
of	O
triggers	B-Language
and	O
stored	B-General_Concept
procedures	I-General_Concept
was	O
one	O
of	O
the	O
breakthrough	O
points	O
up	O
to	O
support	O
the	O
use	O
of	O
PL/SQL	B-Language
in	O
a	O
OO	O
paradigm	O
.	O
</s>
<s>
The	O
inclusion	O
in	O
the	O
SQL	B-Language
syntax	O
of	O
statements	O
such	O
as	O
,	O
and	O
the	O
implementation	O
of	O
the	O
object	B-Language
type	O
(	O
like	O
any	O
OO	O
language	O
)	O
,	O
completed	O
the	O
minimum	O
requisites	O
to	O
a	O
mapping	O
approach	O
in	O
an	O
extended	O
SQL	B-Language
language	I-Language
without	O
use	O
of	O
specific	B-Library
mapping	I-Library
software	I-Library
.	O
</s>
<s>
The	O
O-PSL/SQL	O
is	O
n't	O
simply	O
the	O
use	O
a	O
version	O
of	O
a	O
programming	O
language	O
but	O
it	O
's	O
identified	O
as	O
how	O
to	O
use	O
it	O
,	O
and	O
it	O
defines	O
the	O
autonomy	O
of	O
the	O
theme	O
.	O
</s>
<s>
Each	O
version	O
of	O
PL/SQL	B-Language
,	O
starting	O
from	O
7	O
,	O
brings	O
so	O
many	O
innovations	O
that	O
it	O
's	O
impossible	O
to	O
treat	O
such	O
usages	O
as	O
sub-themes	O
of	O
PL/SQL	B-Language
.	O
</s>
<s>
There	O
can	O
be	O
confusion	O
of	O
the	O
notions	O
of	O
object	B-Language
of	O
DBMS	O
and	O
of	O
class	O
object	B-Language
.	O
</s>
<s>
It	O
's	O
necessary	O
to	O
identify	O
when	O
the	O
documentation	O
refers	O
to	O
an	O
object	B-Language
as	O
one	O
of	O
the	O
two	O
definitions	O
.	O
</s>
<s>
Database	O
objects	O
are	O
concepts	O
that	O
refer	O
to	O
relational	B-Architecture
or	O
sequential	O
databases	B-Application
and	O
persist	O
being	O
valid	O
in	O
new	O
models	O
.	O
</s>
<s>
Tables	O
,	O
triggers	B-Language
,	O
columns	O
,	O
indexes	O
are	O
examples	O
of	O
database	O
objects	O
,	O
which	O
are	O
present	O
in	O
O-PL/SQL	B-Application
,	O
but	O
with	O
the	O
same	O
meaning	O
of	O
the	O
notion	O
of	O
Java	B-Language
objects	O
,	O
specifically	O
an	O
element	O
of	O
a	O
set	O
that	O
has	O
its	O
existence	O
beginning	O
from	O
an	O
instantiation	O
of	O
a	O
class	O
.	O
</s>
<s>
PL/SQL	B-Language
is	O
the	O
extended	O
SQL	B-Language
language	I-Language
used	O
by	O
Oracle	B-General_Concept
Database	I-General_Concept
.	O
</s>
<s>
PL/SQL	B-Language
is	O
available	O
in	O
Oracle	B-General_Concept
Database	I-General_Concept
(	O
since	O
version	O
7	O
)	O
,	O
TimesTen	B-Application
in-memory	I-Application
database	I-Application
(	O
since	O
version	O
11.2.1	O
)	O
,	O
and	O
IBM	B-Application
Db2	I-Application
(	O
since	O
version	O
9.7	O
)	O
.	O
</s>
<s>
O-PL/SQL	B-Application
allows	O
the	O
definition	O
of	O
classes	O
and	O
instantiating	O
these	O
as	O
objects	O
,	O
</s>
<s>
thus	O
creating	O
user-defined	O
datatypes	O
as	O
writing	O
constructors	O
,	O
beyond	O
using	O
Java	B-Language
in	O
stored	B-General_Concept
procedures	I-General_Concept
and	O
triggers	B-Language
.	O
</s>
<s>
Here	O
is	O
a	O
small	O
set	O
of	O
examples	O
of	O
O-PL/SQL	B-Application
syntax	O
,	O
extracted	O
from	O
the	O
official	O
documentation	O
and	O
other	O
sources	O
:	O
</s>
