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Top Forums Shell Programming and Scripting Select record with MAX value in MySQL Post 302433575 by radoulov on Wednesday 30th of June 2010 03:47:31 AM
Old 06-30-2010
OK, for example, you could try to normalize the data structures at least to the 1 normal form:

Quote:
First normal form excludes variable repeating fields and groups
You should take out the owners and the groups in a separate structures - so you'll end up with:

Code:
users                  

uid pk
username

Code:
groups

gid pk
group

May one archive contain more than one file? So:

Code:
paths

path_id pk
path

And so on ..., the permission mask is also a candidate because of repeating data.

Then you could create the files table with all attributes referenced by the relative ids.

Why do you want a separate tables for files and versions? You could have all the information in one table: filename, path_id, uid, gid, mod_time etc.

If you need to know the most recent versions at any time, you could create a view that selects them.


Just my 0.02€.
 

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isamlog(1)							  MySQL database							isamlog(1)

NAME
isamlog - Write info about whats in a nisam log file. USAGE
isamlog [-?iruvIV] [-c #] [-f #] [-F filepath/] [-o #] [-R file recordpos] [-w write_file] [log-filename [table ...]] SYNOPSIS
isamlog [-?|-I] [-V] [-c] [-f] [-F] [-i] [-o] [-p #] [-r] [-R] [-u] [-v] [-w] DESCRIPTION
isamlog -?|-I info -V version -c do only # commands -f max open files -F file path -i extra info -o offset -p # remove # components from path -r recover -R file recordposition -u update -v verbose -w write file NOTE
If no file name is given isam.log is used One can give a second and a third '-v' for more verbose. Normaly one does a update (-u). If a recover is done all writes and all possibly updates and deletes is done and errors are only counted. If one gives table names as arguments only these tables will be updated SEE ALSO
isamchk(1), mysql(1), mysqlaccess(1), mysqladmin(1), mysqld(1), mysqld_multi(1), mysqld_safe(1), mysqldump(1), mysql_fix_privi- lege_tables(1), mysqlshow(1), mysql_zap(1), perror(1), replace(1) For more information please refer to the MySQL reference manual, which may already be installed locally and which is also available online at http://www.mysql.com/doc/en/ BUGS
Please refer to http://bugs.mysql.com/ to report bugs. AUTHOR
Ver 1.0, distribution 4.0.24 Michael (Monty) Widenius (monty@mysql.com), MySQL AB (http://www.mysql.com/). This software comes with no warranty. Manual page by L. (Kill-9) Pedersen (kill-9@kill-9.dk), Mercurmedia Data Model Architect / system developer (http://www.mercur- media.com) ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +--------------------+------------------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +--------------------+------------------------------------+ |Availability | SUNWmysqlr, SUNWmysqlu, SUNWmysqlt | +--------------------+------------------------------------+ |Interface Stability | External | +--------------------+------------------------------------+ NOTES
Source for mysql is available on http://opensolaris.org. MySQL 4.0 19 December 2000 isamlog(1)
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