<s>
SQL	B-Application
PL	I-Application
stands	O
for	O
Structured	B-Language
Query	I-Language
Language	I-Language
Procedural	B-Application
Language	I-Application
and	O
was	O
developed	O
by	O
IBM	O
as	O
a	O
set	O
of	O
commands	O
that	O
extend	O
the	O
use	O
of	O
SQL	B-Language
in	O
the	O
IBM	B-Application
Db2	I-Application
(	O
DB2	B-Application
UDB	I-Application
Version	O
7	O
)	O
database	O
system	O
.	O
</s>
<s>
It	O
provides	O
procedural	B-Application
programmability	I-Application
in	O
addition	O
to	O
the	O
querying	O
commands	O
of	O
SQL	B-Language
.	O
</s>
<s>
It	O
is	O
a	O
subset	O
of	O
the	O
SQL	B-Language
Persistent	O
Stored	O
Modules	O
(	O
SQL/PSM	B-Language
)	O
language	O
standard	O
.	O
</s>
<s>
As	O
of	O
DB2	B-Application
version	O
9	O
,	O
SQL	B-Application
PL	I-Application
stored	B-General_Concept
procedures	I-General_Concept
can	O
run	O
natively	O
inside	O
the	O
DB2	B-Application
process	O
(	O
inside	O
the	O
DBM1	O
address	O
space	O
,	O
more	O
precisely	O
)	O
instead	O
of	O
being	O
fenced	O
in	O
an	O
external	O
process	O
.	O
</s>
<s>
In	O
DB2	B-Application
version	O
9.7	O
IBM	O
also	O
added	O
a	O
PL/SQL	B-Language
front-end	O
to	O
this	O
infrastructure	O
(	O
called	O
"	O
SQL	B-Language
Unified	O
Runtime	O
Engine	O
"	O
)	O
,	O
meaning	O
that	O
procedural	B-Application
SQL	B-Language
using	O
either	O
the	O
ISO	O
standard	O
or	O
Oracle	O
's	O
syntax	O
compile	O
to	O
bytecode	O
running	O
on	O
the	O
same	O
engine	O
in	O
DB2	B-Application
.	O
</s>
