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Re: my new project, is this the right way?

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On Sunday, November 27, 2011 4:49:14 PM UTC+8, 88888 Dihedral wrote:
> On Sunday, November 27, 2011 4:29:52 PM UTC+8, 88888 Dihedral wrote:
> > On Sunday, November 27, 2011 12:03:26 PM UTC+8, Matt Joiner wrote:
> > > Sounds like you want a key-value store. If it's a lot of data, you may
> > > still want a "database", I think it's just relational databases that
> > > you're trying to avoid?
> > > 
> > > On Sun, Nov 27, 2011 at 10:41 AM, 88888 Dihedral
> > > <dih...@googlemail.com> wrote:
> > > > On Saturday, November 26, 2011 1:01:34 AM UTC+8, rusi wrote:
> > > >> On Nov 14, 3:41 pm, Tracubik <aff...@b.com> wrote:
> > > >> > Hi all,
> > > >> > i'm developing a new program.
> > > >> > Mission: learn a bit of database management
> > > >> > Idea: create a simple, 1 window program that show me a db of movies i've
> > > >> > seen with few (<10) fields (actors, name, year etc)
> > > >> > technologies i'll use: python + gtk
> > > >> > db: that's the question
> > > >> >
> > > >> > since i'm mostly a new-bye for as regard databases, my idea is to use
> > > >> > sqlite at the beginning.
> > > >> >
> > > >> > Is that ok? any other db to start with? (pls don't say mysql or similar,
> > > >> > they are too complex and i'll use this in a second step)
> > > >> >
> > > >> > is there any general tutorial of how to start developing a database? i
> > > >> > mean a general guide to databases you can suggest to me?
> > > >> > Thank you all
> > > >> >
> > > >> > MedeoTL
> > > >> >
> > > >> > P.s. since i have a ods sheet files (libreoffice calc), is there a way to
> > > >> > easily convert it in a sqlite db? (maybe via csv)
> > > >>
> > > >> To learn DBMS you need to learn sql
> > > >> [Note sql is necessary but not sufficient for learning DBMS]
> > > >> I recommend lightweight approaches to start with -- others have
> > > >> mentioned access, libreoffice-base.
> > > >> One more lightweight playpen is firefox plugin sqlite-manager
> > > >>
> > > >> > Is that ok? any other db to start with? (pls don't say mysql or similar,
> > > >> > they are too complex and i'll use this in a second step)
> > > >>
> > > >> Correct. First you must figure out how to structure data -- jargon is
> > > >> normalization.
> > > >> After that you can look at transactions, ACID, distribution and all
> > > >> the other good stuff.
> > > >
> > > > If I have a fast hash library  that each hash function supports insertion and deletion and can be frozen to be stored into the file system if desired and retrieved lator . Can I use several hashes to replace a database that is slow and expensive?
> > > >
> > > > --
> > > > http://mail.python.org/mailman/listinfo/python-list
> > > >
> > 
> > A database with most entries in fixed bytes and types and several  types that can have varied lengths of 8 to 256 bytes. If an entry is larger than 256 bytes, it will be saved as a file but only the file name is saved in my data base.
> >   
> > Each entry is just a type and value stored  in a row of my database.
> > I''ll limit the number of entries in a row or so called a recored to some limit first, 1024 first. 
> >    
> > Can I do this in 1024 hashes in python ?
> Sorry I 'll use (k=column_in_a_row, v=value) and (k=value, v=column_in_a_row)
> Thus, two hashes per column in  my database, therefore  2048 hashes to manage the data base.

For the same value stored , I need a column_no+next stored, a list.   
 All relations can be derived.

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my new project, is this the right way? Tracubik <affdfsdfdsfsd@b.com> - 2011-11-14 10:41 +0000
  Re: my new project, is this the right way? Chris Angelico <rosuav@gmail.com> - 2011-11-14 21:55 +1100
    Re: my new project, is this the right way? HoneyMonster <someone@someplace.invalid> - 2011-11-25 15:44 +0000
      Re: my new project, is this the right way? Chris Angelico <rosuav@gmail.com> - 2011-11-26 02:49 +1100
  Re: my new project, is this the right way? Redcat <redcat@catfolks.net> - 2011-11-14 15:47 +0000
  Re: my new project, is this the right way? Jon Clements <joncle@googlemail.com> - 2011-11-14 08:37 -0800
  Re: my new project, is this the right way? Miki Tebeka <miki.tebeka@gmail.com> - 2011-11-14 09:48 -0800
  Re: my new project, is this the right way? rusi <rustompmody@gmail.com> - 2011-11-25 09:01 -0800
    Re: my new project, is this the right way? Roy Smith <roy@panix.com> - 2011-11-25 12:16 -0500
      Re: my new project, is this the right way? rusi <rustompmody@gmail.com> - 2011-11-25 20:48 -0800
    Re: my new project, is this the right way? 88888 Dihedral <dihedral88888@googlemail.com> - 2011-11-26 15:41 -0800
      Re: my new project, is this the right way? Dave Angel <d@davea.name> - 2011-11-26 21:35 -0500
        Re: my new project, is this the right way? Roy Smith <roy@panix.com> - 2011-11-26 21:49 -0500
          Re: my new project, is this the right way? 88888 Dihedral <dihedral88888@googlemail.com> - 2011-11-26 19:14 -0800
            Re: my new project, is this the right way? Chris Angelico <rosuav@gmail.com> - 2011-11-27 14:24 +1100
            Re: my new project, is this the right way? Dave Angel <d@davea.name> - 2011-11-26 22:27 -0500
            Re: my new project, is this the right way? Roy Smith <roy@panix.com> - 2011-11-26 22:41 -0500
      Re: my new project, is this the right way? Matt Joiner <anacrolix@gmail.com> - 2011-11-27 15:03 +1100
        Re: my new project, is this the right way? 88888 Dihedral <dihedral88888@googlemail.com> - 2011-11-27 00:29 -0800
          Re: my new project, is this the right way? 88888 Dihedral <dihedral88888@googlemail.com> - 2011-11-27 00:49 -0800
            Re: my new project, is this the right way? 88888 Dihedral <dihedral88888@googlemail.com> - 2011-11-28 00:51 -0800
            Re: my new project, is this the right way? 88888 Dihedral <dihedral88888@googlemail.com> - 2011-11-28 00:51 -0800
          Re: my new project, is this the right way? 88888 Dihedral <dihedral88888@googlemail.com> - 2011-11-27 00:49 -0800
        Re: my new project, is this the right way? 88888 Dihedral <dihedral88888@googlemail.com> - 2011-11-27 00:29 -0800

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