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Multiple Table Search

384 Contributor
I have a basic search function working with PHP and mysql, can anyone help me to make a function that takes a single search criteria and searches multiple tables and gives the different results back to the user??
Mar 4 '09 #1
12 2253
1,168 Recognized Expert Top Contributor
I'm sure we can help. We however will not write it for you, but rather help you fix your own code. Please post the code in question and any relavent other snippets. Also include a detailed description of what is happening, and what should be happening that is not.
Mar 4 '09 #2
563 Contributor
Are u clear on to which tables to search or search all tables in a DB is needed
Mar 4 '09 #3
6,050 Recognized Expert Expert
You could use a JOIN, but I'm not quite sure on the specifics of your problem. Elaborate?
Mar 4 '09 #4
3,509 Recognized Expert Moderator Specialist
So let me get this right, you have a search in mysql that you want to perform over a bunch of tables.

Why not put the names of the tables into an array and then cycle through the array, performing the search for each table?


Mar 4 '09 #5
8,658 Recognized Expert Moderator Expert
MySQL entry for multiple table selects: MySQL manual - SELECT > JOIN
Mar 5 '09 #6
384 Contributor
Sorry for not getting back sooner. I have this code below for the search so far and it works fine, but it's very crude.
I haven't had much exposure to joins and inner selects which I'm assuming I'm going to need to use to solve my issue. I currently have four table in the database and the below code is just searching the title of these records based on the inputted value and the table selected from the drop down list on the page.
I want the user to just enter a word or phrase and then the search to be run based on the value over the four tables through both the title and body of each record and out put them in a percentage relevant order.
All the fields in the query are the same across all four tables.
Expand|Select|Wrap|Line Numbers
  1. function display_details($q,$table) {
  2.   $link = '';
  4.   $sql = mysql_query("SELECT id,title,body,date,time FROM ".$table." WHERE title LIKE '%".$q."%' ORDER BY date DESC, time DESC");
  5.   while($row = mysql_fetch_array($sql))
  6.   {
  7.     $link_name = preg_replace('#[^a-zA-Z0-9]+#','-',$row['title']);
  8.     echo '<div class="search_results_wrapper">
  9.         <div class="search_results_link_name"><div class="search_results"><a href="'.$link.$row['id'].'-'.$link_name.'.htm">'.$row['title'].'</a></div></div>
  10.         <div class="search_datetime">'.strftime("%b %d, %Y", strtotime($row['date'])).' at '.wordwrap(substr($row['time'],0,5)).'</div>
  11.         <div class="search_results_body">'.add_dots(format_article_2($row['body']),'|',150).'</div>
  12.         <div class="search_results_url">'.$link.$row['id'].'-'.$link_name.'.htm</div>
  13.     </div>
  14. ';
  15.   }
  16. }
Mar 6 '09 #7
384 Contributor
Can anyone advise on this?
Mar 19 '09 #8
6,050 Recognized Expert Expert
Is the seperation of the tables really necessary? If they're holding the same type of data, it makes sense to have it all in one table.

However, you can do multiple joins like so:

Expand|Select|Wrap|Line Numbers
  2. SELECT tb1.*, tbl2.*, tbl3.* FROM `table_1` AS tbl1
  3. LEFT JOIN `table_2` AS tbl2
  4.  ON tbl1.id = tbl2.id
  5. LEFT JOIN `table_3` AS tbl3
  6.  ON tbl2.p_type = tbl3.p_type
Something like that.
Mar 19 '09 #9
384 Contributor
There is other fields in these tables relevent to each section hence why they are not in the one table, i'll try the inner joins and let you know, thanks.
Mar 19 '09 #10

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