<s>
In	O
computer	B-General_Concept
science	I-General_Concept
,	O
in	O
the	O
field	O
of	O
databases	O
,	O
write	B-General_Concept
–	I-General_Concept
write	I-General_Concept
conflict	I-General_Concept
,	O
also	O
known	O
as	O
overwriting	B-General_Concept
uncommitted	I-General_Concept
data	I-General_Concept
is	O
a	O
computational	O
anomaly	O
associated	O
with	O
interleaved	O
execution	O
of	O
transactions	B-General_Concept
.	O
</s>
<s>
note	O
that	O
there	O
is	O
no	O
read	O
in	O
this	O
schedule	B-General_Concept
.	O
</s>
<s>
Any	O
attempts	O
to	O
make	O
this	O
schedule	B-General_Concept
serial	O
would	O
give	O
off	O
two	O
different	O
results	O
(	O
either	O
T1	O
's	O
version	O
of	O
A	O
and	O
B	O
is	O
shown	O
,	O
or	O
T2	O
's	O
version	O
of	O
A	O
and	O
B	O
is	O
shown	O
)	O
,	O
and	O
would	O
not	O
be	O
the	O
same	O
as	O
the	O
above	O
schedule	B-General_Concept
.	O
</s>
<s>
This	O
schedule	B-General_Concept
would	O
not	O
be	O
serializable	B-Operating_System
.	O
</s>
<s>
Strict	B-Operating_System
2PL	I-Operating_System
overcomes	O
this	O
inconsistency	O
by	O
locking	O
T1	O
out	O
from	O
B	O
.	O
</s>
<s>
Unfortunately	O
,	O
deadlocks	B-Operating_System
are	O
something	O
Strict	B-Operating_System
2PL	I-Operating_System
does	O
not	O
overcome	O
all	O
the	O
time	O
.	O
</s>
