<s>
Butler	B-Application
SQL	I-Application
is	O
a	O
now-defunct	O
SQL-based	O
database	B-Application
server	I-Application
for	O
the	O
classic	B-Application
Mac	I-Application
OS	I-Application
from	O
EveryWare	O
Development	O
.	O
</s>
<s>
For	O
much	O
of	O
its	O
history	O
,	O
it	O
was	O
partnered	O
with	O
another	O
EveryWare	O
product	O
,	O
Tango	O
,	O
that	O
built	O
dynamic	O
database	O
pages	O
from	O
SQL	B-Language
data	O
.	O
</s>
<s>
Butler	O
was	O
introduced	O
to	O
take	O
advantage	O
of	O
new	O
a	O
Mac	B-Application
OS	I-Application
component	O
known	O
as	O
the	O
Data	B-Operating_System
Access	I-Operating_System
Manager	I-Operating_System
(	O
DAM	O
)	O
,	O
which	O
was	O
similar	O
in	O
concept	O
to	O
ODBC	B-Application
,	O
allowing	O
end-user	O
client	O
programs	O
to	O
access	O
various	O
data	O
sources	O
.	O
</s>
<s>
DAM	O
,	O
however	O
,	O
worked	O
at	O
a	O
lower	O
level	O
than	O
ODBC	B-Application
and	O
did	O
not	O
contain	O
any	O
inherent	O
query	O
language	O
.	O
</s>
<s>
To	O
address	O
the	O
concern	O
that	O
a	O
single	O
DAM	O
program	O
might	O
want	O
to	O
work	O
with	O
different	O
back-end	O
databases	O
,	O
Apple	O
used	O
a	O
second	O
system	O
known	O
as	O
the	O
Data	B-Operating_System
Access	I-Operating_System
Language	I-Operating_System
(	O
DAL	O
)	O
,	O
which	O
was	O
a	O
variant	O
of	O
SQL	B-Language
that	O
included	O
additional	O
flow-control	O
and	O
data	O
manipulation	O
instructions	O
.	O
</s>
<s>
Butler	O
was	O
written	O
to	O
natively	O
support	O
DAL	O
as	O
its	O
variant	O
of	O
SQL	B-Language
,	O
and	O
use	O
DAM	O
internally	O
to	O
support	O
networking	O
.	O
</s>
<s>
As	O
such	O
,	O
it	O
avoided	O
several	O
intermediary	O
layers	O
that	O
would	O
be	O
required	O
to	O
use	O
the	O
same	O
queries	O
on	O
other	O
database	B-Application
servers	I-Application
.	O
</s>
<s>
Butler	O
2.0	O
,	O
released	O
in	O
May	O
1996	O
,	O
added	O
direct	O
ODBC	B-Application
links	O
as	O
well	O
.	O
</s>
<s>
Butler	O
suffered	O
from	O
performance	O
problems	O
due	O
to	O
the	O
single-user	O
nature	O
of	O
the	O
Mac	B-Application
OS	I-Application
.	O
</s>
