Go Back   vb.org Archive > vBulletin 3 Discussion > vB3 Programming Discussions
FAQ Community Calendar Today's Posts Search

Reply
 
Thread Tools Display Modes
  #1  
Old 11-20-2008, 03:28 PM
rootnik rootnik is offline
 
Join Date: Jun 2002
Posts: 173
Благодарил(а): 0 раз(а)
Поблагодарили: 0 раз(а) в 0 сообщениях
Default Can I do this with mysql?

Let's say I have a table in my database that stores my user's favorite movies. Each row in the table stores a single movie, so the user can have multiple rows in the movie table.

Now I want to display a list of users that are on your friend list and ALSO display what movies each friend has in the database.

Is this possible with 1 query, or am I going to have to get the list of friends first and then perform a separate query for each friend to find out what movies they have 'favorited'?

--------------- Added [DATE]1227203636[/DATE] at [TIME]1227203636[/TIME] ---------------

I believe I found my answer here:

http://www.mysqlperformanceblog.com/...-by-extension/

After some tests it seems that if you are working with 2 large tables you may as well write separate queries. I have 2 tables with over 50,000 rows in each and it takes over 20 seconds to complete the query. This is a good example of less queries not always equaling faster execution.
Reply With Quote
Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 08:32 PM.


Powered by vBulletin® Version 3.8.12 by vBS
Copyright ©2000 - 2024, vBulletin Solutions Inc.
X vBulletin 3.8.12 by vBS Debug Information
  • Page Generation 0.04429 seconds
  • Memory Usage 2,187KB
  • Queries Executed 11 (?)
More Information
Template Usage:
  • (1)SHOWTHREAD
  • (1)ad_footer_end
  • (1)ad_footer_start
  • (1)ad_header_end
  • (1)ad_header_logo
  • (1)ad_navbar_below
  • (1)ad_showthread_beforeqr
  • (1)footer
  • (1)forumjump
  • (1)forumrules
  • (1)gobutton
  • (1)header
  • (1)headinclude
  • (1)navbar
  • (3)navbar_link
  • (120)option
  • (1)post_thanks_box
  • (1)post_thanks_button
  • (1)post_thanks_javascript
  • (1)post_thanks_navbar_search
  • (1)post_thanks_postbit_info
  • (1)postbit
  • (1)postbit_onlinestatus
  • (1)postbit_wrapper
  • (1)showthread_list
  • (1)spacer_close
  • (1)spacer_open
  • (1)tagbit_wrapper 

Phrase Groups Available:
  • global
  • inlinemod
  • postbit
  • posting
  • reputationlevel
  • showthread
Included Files:
  • ./showthread.php
  • ./global.php
  • ./includes/init.php
  • ./includes/class_core.php
  • ./includes/config.php
  • ./includes/functions.php
  • ./includes/class_hook.php
  • ./includes/modsystem_functions.php
  • ./includes/functions_bigthree.php
  • ./includes/class_postbit.php
  • ./includes/class_bbcode.php
  • ./includes/functions_reputation.php
  • ./includes/functions_threadedmode.php
  • ./includes/functions_post_thanks.php 

Hooks Called:
  • init_startup
  • init_startup_session_setup_start
  • init_startup_session_setup_complete
  • cache_permissions
  • fetch_threadinfo_query
  • fetch_threadinfo
  • fetch_foruminfo
  • style_fetch
  • cache_templates
  • global_start
  • parse_templates
  • global_setup_complete
  • showthread_start
  • showthread_getinfo
  • forumjump
  • showthread_post_start
  • showthread_query_postids_threaded
  • showthread_threaded_construct_link
  • showthread_query
  • bbcode_fetch_tags
  • bbcode_create
  • showthread_postbit_create
  • postbit_factory
  • postbit_display_start
  • post_thanks_function_post_thanks_off_start
  • post_thanks_function_post_thanks_off_end
  • post_thanks_function_fetch_thanks_start
  • post_thanks_function_fetch_thanks_end
  • post_thanks_function_thanked_already_start
  • post_thanks_function_thanked_already_end
  • fetch_musername
  • postbit_imicons
  • bbcode_parse_start
  • bbcode_parse_complete_precache
  • bbcode_parse_complete
  • postbit_display_complete
  • post_thanks_function_can_thank_this_post_start
  • tag_fetchbit_complete
  • forumrules
  • navbits
  • navbits_complete
  • showthread_complete