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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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MYSQL_CONFIG(1) 					       MySQL Database System						   MYSQL_CONFIG(1)

NAME
mysql_config - get compile options for compiling clients SYNOPSIS
mysql_config options DESCRIPTION
mysql_config provides you with useful information for compiling your MySQL client and connecting it to MySQL. mysql_config supports the following options. o --cflags Compiler flags to find include files and critical compiler flags and defines used when compiling the libmysqlclient library. The options returned are tied to the specific compiler that was used when the library was created and might clash with the settings for your own compiler. Use --include for more portable options that contain only include paths. o --include Compiler options to find MySQL include files. o --libmysqld-libs, --embedded Libraries and options required to link with the MySQL embedded server. o --libs Libraries and options required to link with the MySQL client library. o --libs_r Libraries and options required to link with the thread-safe MySQL client library. o --plugindir The default plugin directory path name, defined when configuring MySQL. This option was added in MySQL 5.1.24. o --port The default TCP/IP port number, defined when configuring MySQL. o --socket The default Unix socket file, defined when configuring MySQL. o --version Version number for the MySQL distribution. If you invoke mysql_config with no options, it displays a list of all options that it supports, and their values: shell> mysql_config Usage: /usr/local/mysql/bin/mysql_config [options] Options: --cflags [-I/usr/local/mysql/include/mysql -mcpu=pentiumpro] --include [-I/usr/local/mysql/include/mysql] --libs [-L/usr/local/mysql/lib/mysql -lmysqlclient -lz -lcrypt -lnsl -lm -L/usr/lib -lssl -lcrypto] --libs_r [-L/usr/local/mysql/lib/mysql -lmysqlclient_r -lpthread -lz -lcrypt -lnsl -lm -lpthread] --socket [/tmp/mysql.sock] --port [3306] --version [4.0.16] --libmysqld-libs [-L/usr/local/mysql/lib/mysql -lmysqld -lpthread -lz -lcrypt -lnsl -lm -lpthread -lrt] You can use mysql_config within a command line to include the value that it displays for a particular option. For example, to compile a MySQL client program, use mysql_config as follows: shell> CFG=/usr/local/mysql/bin/mysql_config shell> sh -c "gcc -o progname `$CFG --include` progname.c `$CFG --libs`" When you use mysql_config this way, be sure to invoke it within backtick ("`") characters. That tells the shell to execute it and substitute its output into the surrounding command. COPYRIGHT
Copyright 2007-2008 MySQL AB, 2008-2010 Sun Microsystems, Inc. This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License. This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/. SEE ALSO
For more information, please refer to the MySQL Reference Manual, which may already be installed locally and which is also available online at http://dev.mysql.com/doc/. AUTHOR
Sun Microsystems, Inc. (http://www.mysql.com/). MySQL 5.1 04/06/2010 MYSQL_CONFIG(1)
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