<s>
In	O
the	O
context	O
of	O
data	O
management	O
,	O
autocommit	B-General_Concept
is	O
a	O
mode	O
of	O
operation	O
of	O
a	O
database	B-General_Concept
connection	I-General_Concept
.	O
</s>
<s>
Each	O
individual	O
database	O
interaction	O
(	O
i.e.	O
,	O
each	O
SQL	B-Language
statement	O
)	O
submitted	O
through	O
the	O
database	B-General_Concept
connection	I-General_Concept
in	O
autocommit	B-General_Concept
mode	O
will	O
be	O
executed	O
in	O
its	O
own	O
transaction	B-General_Concept
that	O
is	O
implicitly	O
committed	O
.	O
</s>
<s>
A	O
SQL	B-Language
statement	O
executed	O
in	O
autocommit	B-General_Concept
mode	O
cannot	O
be	O
rolled	B-Application
back	I-Application
.	O
</s>
<s>
Autocommit	B-General_Concept
mode	O
incurs	O
per-statement	O
transaction	B-General_Concept
overhead	O
and	O
can	O
often	O
lead	O
to	O
undesirable	O
performance	O
or	O
resource	O
utilization	O
impact	O
on	O
the	O
database	O
.	O
</s>
<s>
Nonetheless	O
,	O
in	O
systems	O
such	O
as	O
Microsoft	O
SQL	B-Language
Server	O
,	O
as	O
well	O
as	O
connection	O
technologies	O
such	O
as	O
ODBC	O
and	O
Microsoft	O
OLE	O
DB	O
,	O
autocommit	B-General_Concept
mode	O
is	O
the	O
default	O
for	O
all	O
statements	O
that	O
change	O
data	O
,	O
in	O
order	O
to	O
ensure	O
that	O
individual	O
statements	O
will	O
conform	O
to	O
the	O
ACID	O
(	O
atomicity-consistency-isolation-durability	O
)	O
properties	O
of	O
transactions	O
.	O
</s>
<s>
The	O
alternative	O
to	O
autocommit	B-General_Concept
mode	O
(	O
non-autocommit	O
)	O
means	O
that	O
the	O
SQL	B-Language
client	B-Protocol
application	I-Protocol
itself	O
is	O
responsible	O
for	O
ending	O
transactions	O
explicitly	O
via	O
the	O
commit	B-Language
or	O
rollback	B-Application
SQL	B-Language
commands	O
.	O
</s>
<s>
Non-autocommit	O
mode	O
enables	O
grouping	O
of	O
multiple	O
data	O
manipulation	O
SQL	B-Language
commands	O
into	O
a	O
single	O
atomic	B-General_Concept
transaction	B-General_Concept
.	O
</s>
<s>
Most	O
DBMS	B-General_Concept
(	O
e.g.	O
</s>
<s>
MariaDB	B-Application
)	O
force	O
autocommit	B-General_Concept
for	O
every	O
DDL	B-Language
statement	O
,	O
even	O
in	O
non-autocommit	O
mode	O
.	O
</s>
<s>
In	O
this	O
case	O
,	O
before	O
each	O
DDL	B-Language
statement	O
,	O
previous	O
DML	B-Language
statements	O
in	O
transaction	B-General_Concept
are	O
autocommitted	O
.	O
</s>
<s>
Each	O
DDL	B-Language
statement	O
is	O
executed	O
in	O
its	O
own	O
new	O
autocommit	B-General_Concept
transaction	B-General_Concept
.	O
</s>
