English 中文(简体)
采用“AS分数”从我sql全文检索中恢复相关性分数
原标题:Using "AS score" to return relevance score from mysql fulltext search

I m selecting text from a full-text mysql dbTable, hits are returned ordered by relevance multiplied by a client supplied weight. The query works fine, though I d like to as an "AS score" clause to the query to return the actual weighted relevance scores back to the client (via php). I ve tried inserting the AS clause everywhere, with no success. Suggestions? Thank You

$sql1="SELECT * FROM $dbTable 
WHERE MATCH (data) AGAINST ( ".$key_word_1." ) 
   OR MATCH (data) AGAINST( ".$key_word_2." ) 
ORDER BY (MATCH (data) AGAINST( ".$key_word_1." ) * $weight_1) + (MATCH (data) AGAINST( ".$key_word_2." ) * $weight_2)  DESC 
LIMIT 200";
问题回答

you can do this:

SELECT * , (MATCH (data) AGAINST( ".$key_word_1." ) * $weight_1) + (MATCH (data) AGAINST( ".$key_word_2." ) * $weight_2) AS score
....
ORDER BY score DESC




相关问题
SQL SubQuery getting particular column

I noticed that there were some threads with similar questions, and I did look through them but did not really get a convincing answer. Here s my question: The subquery below returns a Table with 3 ...

please can anyone check this while loop and if condition

<?php $con=mysql_connect("localhost","mts","mts"); if(!con) { die( unable to connect . mysql_error()); } mysql_select_db("mts",$con); /* date_default_timezone_set ("Asia/Calcutta"); $date = ...

php return a specific row from query

Is it possible in php to return a specific row of data from a mysql query? None of the fetch statements that I ve found return a 2 dimensional array to access specific rows. I want to be able to ...

Character Encodings in PHP and MySQL

Our website was developed with a meta tag set to... <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> This works fine for M-dashes and special quotes, etc. However, I ...

Pagination Strategies for Complex (slow) Datasets

What are some of the strategies being used for pagination of data sets that involve complex queries? count(*) takes ~1.5 sec so we don t want to hit the DB for every page view. Currently there are ~...

Averaging a total in mySQL

My table looks like person_id | car_id | miles ------------------------------ 1 | 1 | 100 1 | 2 | 200 2 | 3 | 1000 2 | 4 | 500 I need to ...

热门标签