php - PHP mySQL 搜索跨 2 个字段的连接信息

Question

我有一个正常运行的 mySQL 搜索系统。

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

我还想搜索输入的术语（包括空格）是否是first_name ' ' surname.如何完成的串联。

Answer 1

我认为您将需要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");

您不妨减少到：

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

考虑将其设为一个 full_name 字段，然后您可以出于速度原因对其进行索引。