一个循环中有两个选择查询

Question

对于下面的代码，我需要在一个循环中进行两次查询，＆＃34; mysqli_fetch_assoc＆＃34;总是给出一个错误..甚至建议如何使用＆＃34; mysqli_multi_query＆＃34;在下面的案例..提前感谢你们..

出现此错误＆＃34; - mysqli_fetch_assoc（）期望参数1为mysqli_result，boolean在 - ）中给出

QNetworkAccessManager

Answer 1

尝试：

$query = " (Select * from record ORDER BY id desc) UNION (Select cl_data.address as caddr from record left outer join cl_data on cl_data.name =record.name)";

从查询中间删除;