well about the date default value being invalid, well it´s working here in
my system (MySQL 4.1.16, Mac OS X 10.4.5), and all my systens work with
About the business logic I was thinking about showing the current month by
default, and if the user wants he can select diferent days, months and
year, or beetween dates.. And everything will be shown in a simple list,
with some graphics like bills to pay in the next week, income to recieve
in next week, and simple stats of that kind..
To split in two tables (income and outcome) seams a good idea...
Bruno B B Magalhães
> Hello Bruno,
>> I am designing a simple accountability system so all the partners can
>> direct access to it by intranet.
>> I was designing the data model, and came up with this:
>> CREATE TABLE `moviments` (
>> `moviment_id` int(20) NOT NULL auto_increment,
>> `moviment_date` date NOT NULL default '0000-00-00',
> What a weird default date -> it's rather invalid, isn't it?
>> `moviment_description` char(200) NOT NULL default '',
>> `moviment_assignor` char(80) NOT NULL default '',
>> `moviment_drawee` char(80) NOT NULL default '',
>> `moviment_amount` int(20) NOT NULL default '0',
>> PRIMARY KEY (`moviment_id`)
>> ) ENGINE=MyISAM DEFAULT CHARSET=latin1
> btw, given all the "default" clauses, did you know you can actually
> put a complete empty "moviment" into this table? Doesn't say a thing.
> You might want to change that a bit :-)
>> But I am a little bit stuck with this:
>> Should I use a column to mark if the moviment has been executed?
>> About income and outcome, should I use a column called moviment_type or
>> just put a negative value when is an outcome for exampe?
> Calculating summaries etc is, I think, much easier if you just do a minus.
>> Does anyone ever made something like that, any other idea that could
>> improve my little system?
> Well, it depends on what you're trying to do and how you want to
> query data.
> You could also decide to create two tables -> one for positives and one
> for negatives.
> Martijn Tonies
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