<s>
The	O
Jakarta	B-Language
Persistence	I-Language
Query	I-Language
Language	I-Language
(	O
JPQL	B-Language
;	O
formerly	O
Java	B-Language
Persistence	I-Language
Query	I-Language
Language	I-Language
)	O
is	O
a	O
platform-independent	B-Operating_System
object-oriented	B-Language
query	B-Language
language	I-Language
defined	O
as	O
part	O
of	O
the	O
Jakarta	B-Language
Persistence	I-Language
(	O
JPA	O
;	O
formerly	O
Java	B-Language
Persistence	I-Language
API	I-Language
)	O
specification	O
.	O
</s>
<s>
JPQL	B-Language
is	O
used	O
to	O
make	O
queries	O
against	O
entities	O
stored	O
in	O
a	O
relational	O
database	O
.	O
</s>
<s>
It	O
is	O
heavily	O
inspired	O
by	O
SQL	B-Language
,	O
and	O
its	O
queries	O
resemble	O
SQL	B-Language
queries	O
in	O
syntax	O
,	O
but	O
operate	O
against	O
JPA	O
entity	O
objects	O
rather	O
than	O
directly	O
with	O
database	O
tables	O
.	O
</s>
<s>
In	O
addition	O
to	O
retrieving	O
objects	O
(	O
SELECT	O
queries	O
)	O
,	O
JPQL	B-Language
supports	O
set	O
based	O
UPDATE	O
and	O
DELETE	O
queries	O
.	O
</s>
<s>
JPQL	B-Language
supports	O
named	O
parameters	O
,	O
which	O
begin	O
with	O
the	O
colon	O
(	O
:	O
)	O
.	O
</s>
<s>
JPQL	B-Language
is	O
based	O
on	O
the	O
Hibernate	B-Library
Query	B-Language
Language	I-Language
(	O
HQL	O
)	O
,	O
an	O
earlier	O
non-standard	O
query	B-Language
language	I-Language
included	O
in	O
the	O
Hibernate	B-Library
object-relational	B-General_Concept
mapping	I-General_Concept
library	O
.	O
</s>
<s>
Hibernate	B-Library
and	O
the	O
HQL	O
were	O
created	O
before	O
the	O
JPA	O
specification	O
.	O
</s>
<s>
As	O
of	O
Hibernate	B-Library
3	O
JPQL	B-Language
is	O
a	O
subset	O
of	O
HQL	O
.	O
</s>
