oracle SQL中的JOINING表

Question

我在尝试在 oracle 中加入两个表并显示值时遇到问题。

我的代码如下所示：

 if ($_POST['action'] == 'show'){
        
        $requestCompSql = "SELECT REQUEST_COMPONENT_CUTTING.PROJECT_NAME, 
                                  REQUEST_COMPONENT_CUTTING.BASE_PLATE, 
                                  REQUEST_COMPONENT_CUTTING.THICKNESS, 
                                    COMPONENT.CUTTING.QTY_REQUIRED,
                                  REQUEST_COMPONENT_CUTTING.QTY_REQUESTED
                                  REQUEST_COMPONENT_CUTTING.REQUESTER, 
                                  REQUEST_COMPONENT_CUTTING.REQUEST_DATE 
                                        FROM REQUEST_COMPONENT_CUTTING
                                        INNER JOIN COMPONENT_CUTTING
                                  ON REQUEST_COMPONENT_CUTTING.PROJECT_NAME = COMPONENT_CUTTING.PROJECT_NAME
                                    AND REQUEST_COMPONENT_CUTTING.THICKNESS = COMPONENT_CUTTING.THICKNESS
                                    AND REQUEST_COMPONENT_CUTTING.BASE_PLATE = COMPONENT_CUTTING.BASE_PLATE = '{$_POST["bp"]}'";

        $requestCompParse = oci_parse($conn, $requestCompSql);

        oci_execute($requestCompParse);

        while($row = oci_fetch_assoc($requestCompParse)){
        
        echo "<div class='table-responsive'>";
        echo "<table class='table table-bordered'>";
                                echo '<table cellspacing = "0"';
                                    echo '<thead>';
                                    echo '<tr>
                                              <th>PROJECT</th>
                                              <th>BASEPLATE</th>
                                              <th>THICK</th>
                                              <th>QTY REQUESTED</th>
                                              <th>QTY REQUIRED</th>
                                              <th>REQUESTER</th>
                                              <th>REQ. DATE</th>
                                              <th align="center">ACTION</th>  
                                          </tr>
                                          </thead>';

                                     echo "<tbody>";
                                        echo "<tr class='warning'><td>$row[PROJECT_NAME]</td>";
                                        echo "<td>$row[BASE_PLATE]</td>";
                                        echo "<td>$row[THICKNESS]</td>";
                                        echo "<td>$row[QTY_REQUESTED]</td>";
                                        echo "<td>$row[QTY_REQUIRED]</td>";
                                        echo "<td>$row[REQUESTER]</td>";
                                        echo "<td>$row[REQUEST_DATE]</td>";
                                        echo "<td><input type='button' value='OK' class='btn btn-success'>
                                            <input type='button' value='REJECT' class='btn btn-danger'></td>";

                                        echo "</tr>";
                                     echo "</tbody>";
                                 echo "<table cellspacing = '0'";
                                 echo "</div>";
        }

    }

给出的错误信息是这样的：

警告：oci_execute(): ORA-00923: FROM 关键字未在 C:\xampp\htdocs\WeltesInformationCenter\Component_approval\show_requested_component.php 第 60 行的预期位置找到

警告：oci_fetch_assoc(): ORA-24374: define not done before fetch or execute and fetch in C:\xampp\htdocs\WeltesInformationCenter\Component_approval\show_requested_component.php on line 62

我对此感到非常沮丧，因为QTY_REQUIRED 的值必须基于PROJECT_NAME、THICKNESS 和BASE_PLATE

Answer 1

where 子句的最后一行是：

AND REQUEST_COMPONENT_CUTTING.BASE_PLATE = COMPONENT_CUTTING.BASE_PLATE = '{$_POST["bp"]}'

你应该把它分成两个不同的条件：

AND REQUEST_COMPONENT_CUTTING.BASE_PLATE = COMPONENT_CUTTING.BASE_PLATE
AND COMPONENT_CUTTING.BASE_PLATE = '{$_POST["bp"]}'

另外，select 中缺少逗号，需要用下划线替换句点：

                       SELECT REQUEST_COMPONENT_CUTTING.PROJECT_NAME, 
                              REQUEST_COMPONENT_CUTTING.BASE_PLATE, 
                              REQUEST_COMPONENT_CUTTING.THICKNESS, 
                                COMPONENT_CUTTING.QTY_REQUIRED,
-----------------------------------------^
                              REQUEST_COMPONENT_CUTTING.QTY_REQUESTED,
---------------------------------------------------------------------^
                              REQUEST_COMPONENT_CUTTING.REQUESTER, 
                              REQUEST_COMPONENT_CUTTING.REQUEST_DATE 

Answer 2

您忘记输入WHERE，缺少 1 个逗号和不规则的三向比较。试试这样：

 $requestCompSql = "SELECT REQUEST_COMPONENT_CUTTING.PROJECT_NAME, 
                                      REQUEST_COMPONENT_CUTTING.BASE_PLATE, 
                                      REQUEST_COMPONENT_CUTTING.THICKNESS, 
                                        COMPONENT.CUTTING.QTY_REQUIRED,
                                      REQUEST_COMPONENT_CUTTING.QTY_REQUESTED,
                                      REQUEST_COMPONENT_CUTTING.REQUESTER, 
                                      REQUEST_COMPONENT_CUTTING.REQUEST_DATE 
                                            FROM REQUEST_COMPONENT_CUTTING
                                            INNER JOIN COMPONENT_CUTTING
                                      ON REQUEST_COMPONENT_CUTTING.PROJECT_NAME = COMPONENT_CUTTING.PROJECT_NAME
                                        WHERE REQUEST_COMPONENT_CUTTING.THICKNESS = COMPONENT_CUTTING.THICKNESS
                                        AND REQUEST_COMPONENT_CUTTING.BASE_PLATE = COMPONENT_CUTTING.BASE_PLATE
                                        AND COMPONENT_CUTTING.BASE_PLATE = '{$_POST["bp"]}'";

Answer 3

您好，我在您的查询中发现了两个问题

第 5 行后缺少 1，逗号 ','

REQUEST_COMPONENT_CUTTING.QTY_REQUESTED REQUEST_COMPONENT_CUTTING.REQUESTER，

2、最后一行没有正确实现条件

AND REQUEST_COMPONENT_CUTTING.BASE_PLATE = COMPONENT_CUTTING.BASE_PLATE = '{$_POST["bp"]}'

这可能是

AND REQUEST_COMPONENT_CUTTING.BASE_PLATE = COMPONENT_CUTTING.BASE_PLATE AND COMPONENT_CUTTING.BASE_PLATE = '{$_POST["bp"]}'"

以上只是猜测，您可以根据自己的要求进行更正。