[fpc-pascal] How to clear the value of a field in a table using parameters?

[Mark Morgan Lloyd]

Michael Van Canneyt wrote:

>> Not everywhere. In Oracle empty strings are Null (which is why we have 
>> special code for this situation in our business
>> application).
> 
> That's a deviation from the standard. NULL means "we don't know", empty 
> means "we know it is empty"

Actually, it means "we don't know and won't be told" since  null or true 
-> null  and so on.

A bit like some political movements, frankly :-)

-- 
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk

[Opinions above are the author's, not those of his employers or colleagues]