<s>
SQL:2011	B-Language
or	O
ISO/IEC	B-Language
9075:2011	I-Language
(	O
under	O
the	O
general	O
title	O
"	O
Information	O
technology	O
–	O
Database	O
languages	O
–	O
SQL	B-Language
"	O
)	O
is	O
the	O
seventh	O
revision	O
of	O
the	O
ISO	O
(	O
1987	O
)	O
and	O
ANSI	O
(	O
1986	O
)	O
standard	O
for	O
the	O
SQL	B-Language
database	I-Language
query	B-Language
language	I-Language
.	O
</s>
<s>
The	O
standard	O
consists	O
of	O
9	O
parts	O
which	O
are	O
described	O
in	O
detail	O
in	O
SQL	B-Language
.	O
</s>
<s>
The	O
next	O
version	O
is	O
SQL:2016	B-Language
.	O
</s>
<s>
Definition	O
of	O
system-versioned	O
tables	O
(	O
elsewhere	O
called	O
transaction	B-General_Concept
time	I-General_Concept
tables	O
)	O
,	O
using	O
the	O
annotation	O
and	O
modifier	O
.	O
</s>
<s>
IBM	B-Application
DB2	I-Application
version	O
10	O
claims	O
to	O
be	O
the	O
first	O
database	O
to	O
have	O
a	O
conforming	O
implementation	O
of	O
this	O
feature	O
in	O
what	O
they	O
call	O
"	O
Time	O
Travel	O
Queries	O
"	O
,	O
although	O
they	O
use	O
the	O
alternative	O
syntax	O
.	O
</s>
<s>
Oracle	B-General_Concept
Oracle	B-General_Concept
12c	O
supports	O
temporal	O
functionality	O
in	O
compliance	O
with	O
SQL:2011	B-Language
.	O
</s>
<s>
Notably	O
both	O
of	O
Oracle	B-General_Concept
's	O
implementations	O
depend	O
on	O
the	O
database	O
transaction	B-General_Concept
log	I-General_Concept
and	O
so	O
only	O
allow	O
temporal	O
queries	O
against	O
recent	O
changes	O
which	O
are	O
still	O
being	O
retained	O
for	O
backup	O
.	O
</s>
<s>
Microsoft	B-Application
SQL	I-Application
Server	I-Application
(	O
version	O
2016	O
)	O
implements	O
temporal	O
tables	O
with	O
.	O
</s>
<s>
MariaDB	B-Application
10.3	O
implements	O
system-versioned	O
tables	O
.	O
</s>
<s>
MariaDB	B-Application
10.4.3	O
added	O
support	O
for	O
application-versioned	O
tables	O
.	O
</s>
<s>
PostgreSQL	B-Application
requires	O
installation	O
of	O
the	O
.	O
</s>
<s>
Temporal	O
Tables	O
Extension	O
supports	O
the	O
system-period	O
temporal	O
tables	O
only	O
,	O
but	O
does	O
not	O
follow	O
the	O
SQL:2011	B-Language
design	O
.	O
</s>
<s>
Ebean	B-Language
ORM	O
supports	O
History	O
AS	O
OF	O
and	O
VERSIONS	O
BETWEEN	O
queries	O
on	O
PostgreSQL	B-Application
and	O
MySQL	B-Application
using	O
.	O
</s>
<s>
CockroachDB	B-Operating_System
has	O
supported	O
queries	O
since	O
at	O
least	O
.	O
</s>
