php - 如何在多个表中进行搜索？

Question

我有2个表病史和病史中的患者我有字段名称DoctorId和PatientId，在患者中我有PatientId，FirstName，MiddleName，LastName

到目前为止，我的查询是它只过滤一张表和来自病史的患者 ID。

$dids = $_SESSION["DoctorId"];
if(isset($_POST["btnsrch"])&& ($_POST["textbox"]!="")){
   $pid = $_POST["textbox"];
    $pid= mysqli_real_escape_string($_POST["textbox"]);

   $query2= mysqli_query($link,"Select DISTINCT PatientId from medicalhistory where DoctorId='". $dids ."' or PatientId='". $pid ."'" );

}

我的问题是我将如何查询名字、中间名和姓氏，但它只会查询在病史中有该医生记录的姓名？

Answer 1

$query2= mysqli_query($link,"SELECT p.PatientId,p.firstname,p.middlename,p.lastname 
FROM patient p 
INNER JOIN medicalhistory as pa ON (p.PatientId = pa.PatientId) 
WHERE pa.PatientId='".$pid."'" ); 

这将是您修改后的代码:

$dids = $_SESSION["DoctorId"];
if(isset($_POST["btnsrch"])&& ($_POST["textbox"]!="")){
    $pid = $_POST["textbox"];
    $pid= mysqli_real_escape_string($_POST["textbox"]);

    $query2= mysqli_query($link,"SELECT p.PatientId, p.FirstName, p.MiddleName, p.LastName,pa.doctorID,pa.Evaluation FROM patient p INNER JOIN medicalhistory as pa ON (p.PatientId=pa.PatientId) WHERE pa.PatientId='".$pid."'" );
}

示例输出:

mysql> select p.id,p.First,p.last, p.middle,pa.id,pa.evalution from test1 as p left join test as pa on (p.id=pa.id) where p.first='Dan' and p.id=4 and p.last='smi
th';
+----+-------+-------+----------+----+-----------+
| id | First | last  | middle   | id | evalution |
+----+-------+-------+----------+----+-----------+
|  4 | Dan   | Smith | chandran |  4 | sick      |
+----+-------+-------+----------+----+-----------+
1 row in set (0.00 sec)