如何将MySQL查询转换为PHP代码

Question

我试图使用Codeigniter作为框架从数据库中获取数据.

我能够提出SQL查询以获得所需的结果,但由于我不熟悉Codeigniter DB语法,我遇到了麻烦.下面是我想要执行的查询.我怎么在PHP中这样做？

任何建议或建议将不胜感激.谢谢.

SELECT A.*, B.*
FROM
    (SELECT A.*
    FROM DriversInfo as A, InvoiceQueue as B
    WHERE A.CreateTime = B.DriverCreateTime
    AND B.Error <> 1
    GROUP BY A.CreateTime
    UNION
    SELECT DISTINCT A.*
    FROM DriversInfo as A, OrderInfo as B
    WHERE A.CreateTime = B.DriverKey
    AND B.Invoice <> '0') as A
LEFT JOIN DriversDoc as B
on A.CreateTime = B.DriverCreateTime
WHERE B.DriversLicense is null
OR B.CarRegistration is null
OR B.BizCertificate is null
OR B.Insurance is null;

Answer 1

试试这个:

$query=$this->db->query("SELECT A.*, B.* FROM (SELECT A.* FROM DriversInfo as A, InvoiceQueue as B WHERE A.CreateTime = B.DriverCreateTime AND B.Error <> 1 GROUP BY A.CreateTime UNION  SELECT DISTINCT A.* FROM DriversInfo as A, OrderInfo as B  WHERE A.CreateTime = B.DriverKey  AND B.Invoice <> '0') as A LEFT JOIN DriversDoc as B on A.CreateTime = B.DriverCreateTime WHERE B.DriversLicense is null OR B.CarRegistration is null OR B.BizCertificate is null OR B.Insurance is null;");