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Hi :)
MariaDb is a drop-in replacement for MySql and is developing much faster.  It might not help with 
the current problems but it might be worth thinking about moving to it sometimes fairly soon.  
http://mariadb.org/
http://en.wikipedia.org/wiki/MariaDB
Presumably it just reads the same data so it shouldn't involve any actual changes and could run 
alongside MySql so that you could test it without committing to it.  I haven't tried it but 
hopefully they make it easy to migrate!

Anyway, all that is a side-issue.  
Regards from
Tom :)



--- On Tue, 3/1/12, Andreas Säger <villeroy@t-online.de> wrote:

From: Andreas Säger <villeroy@t-online.de>
Subject: [libreoffice-users] Re: Base/SQL help
To: users@global.libreoffice.org
Date: Tuesday, 3 January, 2012, 16:37
All the wizards and graphical tools
are more or less broken. What the query
designer can do properly can be done by SQL learners after
the very first
lessons had been learned. Anything slightly advanced has to
be done in plain
SQL.

MySQL has a datediff function:
http://www.w3schools.com/sql/func_datediff_mysql.asp

In Base syntax (parsed mode, should also work in graphical
view):
SELECT "date" AS "Date","ip"||' - '||"serial" AS "Printer",
SUM("counter")AS
"Sum"
FROM "modifiedprintusage"
WHERE DATEDIFF('dd', CURRENT_DATE, "date")<3
GROUP BY "date","ip","serial"

In MySQL syntax (direct SQL mode)
In Base syntax:
SELECT `date` AS `Date`,`ip`||' - '||`serial` AS `Printer`,
SUM(`counter`)AS
`Sum`
FROM `modifiedprintusage`
WHERE DATEDIFF( CURDATE(), `date`)<3
GROUP BY `date`,`ip`,`serial`

It is supposed to return this 3-column table:
Date  |  Printer  |  Sum
2012-01-02 | 192.168.023 - Epson Blurb  |  232
2012-01-02 | 192.168.024 - HP Spitfire  |  1023
...

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