PHP mySQL搜索跨兩個字段的連接信息

Question

我有一個功能正常的mySQL搜索系統。

mysql_query("SELECT * FROM electors WHERE constituency = '$constituency' AND ward = '$ward' AND (surname LIKE '$q' OR first_name LIKE '$q') LIMIT 18"); 

我想還搜索如果輸入項（包括空格）將是first_name ' ' surname.串聯如何做到這一點。

Answer 1

我想你會需要CONCAT：

mysql_query("SELECT * FROM electors WHERE constituency = '$constituency' AND ward = '$ward' AND (surname LIKE '$q' OR first_name LIKE '$q' OR CONCAT(first_name,' ',surname) LIKE '$q') LIMIT 18"); 

，你不妨轉降低到：

mysql_query("SELECT * FROM electors WHERE constituency = '$constituency' AND ward = '$ward' AND CONCAT(first_name,' ',surname) LIKE '%$q%' LIMIT 18"); 

考慮作出它自己的權利這個FULL_NAME領域，那麼你就可以建立索引出於速度原因。