<s>
In	O
a	O
relational	B-Application
database	I-Application
,	O
a	O
column	O
is	O
a	O
set	O
of	O
data	O
values	O
of	O
a	O
particular	O
type	O
,	O
one	O
value	O
for	O
each	O
row	B-Application
of	O
the	O
database	O
.	O
</s>
<s>
Columns	O
typically	O
contain	O
simple	O
types	O
,	O
though	O
some	O
relational	B-Application
database	I-Application
systems	O
allow	O
columns	O
to	O
contain	O
more	O
complex	O
data	O
types	O
,	O
such	O
as	O
whole	O
documents	O
,	O
images	O
,	O
or	O
even	O
video	O
clips	O
.	O
</s>
<s>
Each	O
row	B-Application
would	O
provide	O
a	O
data	O
value	O
for	O
each	O
column	O
and	O
would	O
then	O
be	O
understood	O
as	O
a	O
single	O
structured	O
data	O
value	O
.	O
</s>
<s>
More	O
formally	O
,	O
a	O
row	B-Application
is	O
a	O
tuple	B-Application
containing	O
a	O
specific	O
value	O
for	O
each	O
column	O
,	O
for	O
example	O
:	O
(	O
1234	O
,	O
'	O
Big	O
Company	O
Inc.	O
'	O
,	O
'	O
123	O
East	O
Example	O
Street	O
 '	O
,	O
'	O
456	O
West	O
Example	O
Drive	O
 '	O
,	O
'	O
Big	O
City	O
 '	O
,	O
98765	O
)	O
.	O
</s>
<s>
However	O
,	O
database	O
perfectionists	O
tend	O
to	O
favor	O
using	O
'	O
field	O
 '	O
to	O
signify	O
a	O
specific	O
cell	O
of	O
a	O
given	O
row	B-Application
.	O
</s>
<s>
Columns	O
(	O
really	O
column	O
names	O
)	O
being	O
referred	O
to	O
as	O
field	O
names	O
(	O
common	O
for	O
each	O
row/record	O
in	O
the	O
table	O
)	O
.	O
</s>
<s>
The	O
terms	O
record	O
and	O
field	O
come	O
from	O
the	O
more	O
practical	O
field	O
of	O
database	O
usage	O
and	O
traditional	O
DBMS	B-General_Concept
system	O
usage	O
(	O
This	O
was	O
linked	O
into	O
business	O
like	O
terms	O
used	O
in	O
manual	O
databases	O
e.g.	O
</s>
<s>
The	O
terms	O
row	B-Application
and	O
column	O
come	O
from	O
the	O
more	O
theoretical	O
study	O
of	O
relational	O
theory	O
.	O
</s>
<s>
Another	O
distinction	O
between	O
the	O
terms	O
'	O
column	O
 '	O
and	O
'	O
field	O
 '	O
is	O
that	O
the	O
term	O
'	O
column	O
 '	O
does	O
not	O
apply	O
to	O
certain	O
databases	O
,	O
for	O
instance	O
key-value	B-Data_Structure
stores	I-Data_Structure
,	O
that	O
do	O
not	O
conform	O
to	O
the	O
traditional	O
relational	B-Application
database	I-Application
structure	O
.	O
</s>
