select ...
from table1
left join mytable2 on ...
where ..
select ...
from ( select ... from table1 where ... ) as table1_filtered
inner join mytable2 on ...
with table1_filtered as ( select ... from table1 where ... )
select ...
from table1_filtered
inner join mytable2 on ... <script language="PerlScript">
$window->document->write('Hello world!');
</script>
function confirmVB (text)
confirmVB = msgbox ( Text , VBYesNo )
end function
function confirmYesNo(txtText)
{
if (window.vbSupported)
{
return confirmVB(txtText);
} else {
return confirm(txtText + " (ok = yes, cancel = no)" );
}
}
NaN is a special type indicating one can't reason about it normal way.
It is an unknown or value that can't be represented.
When comparing, think of it like comparing two bags of unknown amount of apples.
One bag has NaN count of apples
Other bag has NaN count of apples
Do the two bags have equal number of apples?
I wish all languages used nulls the way SQL does.