<s>
A	O
COMMIT	O
statement	O
in	O
SQL	B-Language
ends	O
a	O
transaction	B-General_Concept
within	O
a	O
relational	B-Application
database	I-Application
management	I-Application
system	I-Application
(	O
RDBMS	O
)	O
and	O
makes	O
all	O
changes	O
visible	O
to	O
other	O
users	O
.	O
</s>
<s>
The	O
general	O
format	O
is	O
to	O
issue	O
a	O
BEGIN	B-General_Concept
WORK	I-General_Concept
statement	O
,	O
one	O
or	O
more	O
SQL	B-Language
statements	O
,	O
and	O
then	O
the	O
COMMIT	O
statement	O
.	O
</s>
<s>
A	O
COMMIT	O
statement	O
will	O
also	O
release	O
any	O
existing	O
savepoints	B-General_Concept
that	O
may	O
be	O
in	O
use	O
.	O
</s>
<s>
This	O
means	O
that	O
once	O
a	O
COMMIT	O
statement	O
is	O
issued	O
,	O
you	O
can	O
not	O
rollback	B-Application
the	O
transaction	B-General_Concept
.	O
</s>
<s>
In	O
terms	O
of	O
transactions	O
,	O
the	O
opposite	O
of	O
commit	O
is	O
to	O
discard	O
the	O
tentative	O
changes	O
of	O
a	O
transaction	B-General_Concept
,	O
a	O
rollback	B-Application
.	O
</s>
<s>
The	O
transaction	B-General_Concept
,	O
commit	O
and	O
rollback	B-Application
concepts	O
are	O
key	O
to	O
the	O
ACID	O
property	O
of	O
databases	O
.	O
</s>
