如何使用php在数据库中的多列中更快地搜索

Question

If user type keyword in search box I want engine to search in more than 4 column this take long time if can suggest another solution to fast this search as it search in more than 80,000 rows

$kay=$_GET['kay'];

<?php
$search_query = "select * from product where 
                             sku LIKE '%$kay%'
                            or mfr LIKE '%$kay%'
                             or manufacturer LIKE '%$kay%'
                               or LongDesc LIKE '%$kay%')";
?>

Answer 1

The kind of search you have specified -- an OR sequence of col LIKE '%value%' clauses -- is the very slowest way anyone can imagine to search a MySQL table. Why? The promiscuous wildcard search LIKE x where x starts with % can only be satisfied with a full scan.

Switch to FULLTEXT search. You can read about it on the MySql documentation web site.

There was a recent article about an extension to PostgreSQL that exploits hundreds of GPU cores running in parallel to do searches; that might help too.