Re your second query - without looking at the docs,
unix_timestamp(field1) - unix_timestamp(field2) would give you the
difference in seconds - I;m sure there's a cleaner way though!
On Thu, 8
Feb 2001, Quickling wrote:
> Hi,
>
> Question 1:
> ---------------
> We've got a server app that does a lot of 'small' database reads and
> writes. We were originally using MS Access via DAO (Jet Engine) and we
> wanted to tighten up DB performance, so we've written a general ODBC
> database wrapper object, but mainly just to connect to MySQL. I figured
> there'd be ODBC overhead, but its a lot worse than I imagined.
>
> I want to know: does it make sense that our original system, connecting via
> 'Jet-engine' to Access, is actually much faster than connecting to MySQL
> via ODBC? This seems to be what's happened.
>
> I'm wondering if it has to do with the overhead of connecting to a
> server-based database via a tcp socket (even on localhost) rather than the
> direct-to-disk Jet engine; maybe because we do so many small reads/updates
> it's actually faster with Access? Any thoughts? Is it worth my time to
> look into using MySQL directly instead of thru ODBC?
>
> I'm obviously working on Windows (NT), connecting at ODBC version 2.0 to
> MySQL server 3.23, using a database converted directly from Access to MySQL
> using the cool (but unstable) DBTools GUI, which kindly retained all keys
> and indexes (which have been reviewed for speed).
>
>
> Question 2:
> ---------------
> Is there any way in MySQL to compute, inline SQL, the difference between
> two datetime values? I couldn't find a function which could do anything
> but subtract intervals from datetimes... what I need is the interval!
>
>
> Many thanks in advance,
>
> Jesse
>
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