Laravel 中的 DB Raw 查询错误

【问题标题】：DB Raw query error in LaravelLaravel 中的 DB Raw 查询错误
【发布时间】：2018-04-15 20:39:55
【问题描述】：

这是我的 sql.. 当我将它运行到 phpmyadmin 时，它运行正常。但是当我要以 DB:raw in laravel5.5 运行时，它会显示错误。这里，Auckland 不是列名。

$result = DB::select("select DISTINCT(SELECT count(id) FROM Commercial_lease where LENGTH(CONCAT(region,city,"Auckland")) = LENGTH(location) ) as Listing_without_address ,(SELECT count(id) FROM Commercial_lease where LENGTH(CONCAT(region,city,"Auckland"))

【问题讨论】：

标签： php mysql laravel query-builder

【解决方案1】：

您正在混合引用。查询被双引号覆盖，对于Auckland，您试图再次将它们放在双引号中，这会发出错误。

要解决此问题，您可以转义字符串，例如 \"Auckland\" 或使用单引号 'Auckland'

$result = DB::select("select DISTINCT
(SELECT count(id) FROM commercial_lease where LENGTH(CONCAT(region,city,'Auckland')) = LENGTH(location) ) as listing_without_address ,
(SELECT count(id) FROM commercial_lease where LENGTH(CONCAT(region,city,\"Auckland\")) < LENGTH(location)) as listing_with_address ,
(SELECT count(id) FROM commercial_lease WHERE first_agent_name = 'None' and second_agent_name='None') as private_listing from commercial_lease");

【讨论】：