查询记录集

Question

我正在尝试找出如何将$ sql_pay_det查询移到$ sql_pay循环之外（因此实际上是在$ rs_pay_det上进行查询，而不是为循环的每次迭代创建一个新的$ rs_pay_det）

目前，我的代码如下所示：

        //Get payroll transactions
        $sql_pay = 'SELECT Field1, DescriptionandURLlink, Field5, Amount, Field4, PeriodName FROM tblgltransactionspayroll WHERE CostCentreCode = "'.$cc.'" AND SubjectiveCode = "'.$subj.'" AND PeriodNo = "'.$month.'"';
        $rs_pay = mysql_query($sql_pay);
        $row_pay = mysql_fetch_assoc($rs_pay);

            while($row_pay = mysql_fetch_array($rs_pay))
              {
                    $employee_name = $row_pay['Field1'];
                    $assign_no = $row_pay['DescriptionandURLlink'];
                    $pay_period = $row_pay['Field5'];
                    $mth_name = $row_pay['PeriodName'];
                    $amount = $row_pay['Amount'];
                    $total_amount = $total_amount + $amount;
                    $amount = my_number_format($amount, 2, ".", ",");

                    $sql_pay_det = 'SELECT ElementDesc, Amount, WTEWorked, WTEPaid, WTEContract, Payscale FROM tblpayrolldetail WHERE CostCentreCode = "'.$cc.'" AND SubjectiveCode = "'.$subj.'" AND AccountingPeriod = "'.$mth_name.'" AND EmployeeRef = "'.$assign_no.'"';
                    $rs_pay_det = mysql_query($sql_pay_det);
                    $row_pay_det = mysql_fetch_assoc($rs_pay_det);

                while($row_pay_det = mysql_fetch_array($rs_pay_det))
                {
                    $element_det = $row_pay_det['ElementDesc'];
                    $amount_det = $row_pay_det['Amount'];
                    $wte_worked = $row_pay_det['WTEWorked'];
                    $wte_paid = $row_pay_det['WTEPaid'];
                    $wte_cont = $row_pay_det['WTEContract'];
                    $payscale = $row_pay_det['Payscale'];

                    //Get band/point and annual salary where element is basic pay
                    if ($element_det =="3959#Basic Pay"){
                        $sql_payscale = 'SELECT txtPayscaleName, Salary FROM tblpayscalemapping WHERE txtPayscale = "'.$payscale.'"';
                        $rs_payscale = mysql_query($sql_payscale);
                        $row_payscale = mysql_fetch_assoc($rs_payscale);

                        $grade = $row_payscale['txtPayscaleName'];
                        $salary = "£" . my_number_format($row_payscale['Salary'], 0, ".", ",");

                    }
                }
            }

我尝试这样做：

        //Get payroll transactions
        $sql_pay = 'SELECT Field1, DescriptionandURLlink, Field5, Amount, Field4, PeriodName FROM tblgltransactionspayroll WHERE CostCentreCode = "'.$cc.'" AND SubjectiveCode = "'.$subj.'" AND PeriodNo = "'.$month.'"';
        $rs_pay = mysql_query($sql_pay);
        $row_pay = mysql_fetch_assoc($rs_pay);

        //Get payroll detail recordset
        $sql_pay_det = 'SELECT ElementDesc, Amount, WTEWorked, WTEPaid, WTEContract, Payscale, EmployeeRef FROM tblpayrolldetail WHERE CostCentreCode = "'.$cc.'" AND SubjectiveCode = "'.$subj.'" AND AccountingPeriod = "'.$mth_name.'"';
        $rs_pay_det = mysql_query($sql_pay_det);

            while($row_pay = mysql_fetch_array($rs_pay))
              {
                    $employee_name = $row_pay['Field1'];
                    $assign_no = $row_pay['DescriptionandURLlink'];
                    $pay_period = $row_pay['Field5'];
                    $mth_name = $row_pay['PeriodName'];
                    $amount = $row_pay['Amount'];
                    $total_amount = $total_amount + $amount;
                    $amount = my_number_format($amount, 2, ".", ",");

                    //Query $rs_pay_det
                    $sql_pay_det2 = 'SELECT ElementDesc, Amount, WTEWorked, WTEPaid, WTEContract, Payscale FROM ('.$sql_pay_det.') tpd WHERE EmployeeRef = "'.$assign_no.'"';
                    $rs_pay_det2 = mysql_query($sql_pay_det2);
                    $row_pay_det2 = mysql_fetch_assoc($rs_pay_det2);

                while($row_pay_det2 = mysql_fetch_array($rs_pay_det2))
                {
                    $element_det = $row_pay_det2['ElementDesc'];
                    $amount_det = $row_pay_det2['Amount'];
                    $wte_worked = $row_pay_det2['WTEWorked'];
                    $wte_paid = $row_pay_det2['WTEPaid'];
                    $wte_cont = $row_pay_det2['WTEContract'];
                    $payscale = $row_pay_det2['Payscale'];

                    //Get band/point and annual salary where element is basic pay
                    if ($element_det =="3959#Basic Pay"){
                        $sql_payscale = 'SELECT txtPayscaleName, Salary FROM tblpayscalemapping WHERE txtPayscale = "'.$payscale.'"';
                        $rs_payscale = mysql_query($sql_payscale);
                        $row_payscale = mysql_fetch_assoc($rs_payscale);

                        $grade = $row_payscale['txtPayscaleName'];
                        $salary = "£" . my_number_format($row_payscale['Salary'], 0, ".", ",");

                    }
                }
            }

但是我在$ row_pay_det2上收到一个错误，说“ mysql_fetch_assoc（）：提供的参数不是有效的MySQL结果资源”

Answer 1

您的subquery语法（ ... FROM "'.$rs_pay_det.'" ... ）错误。

根据手册-dev.mysql.com/doc/refman/5.0/en/from-clause-subqueries.html

子查询在SELECT语句的FROM子句中是合法的。 实际语法为：

SELECT ... FROM（子查询）[AS]名称...

尝试更改为-

$sql_pay_det2 = 'SELECT ElementDesc, Amount, WTEWorked, WTEPaid, WTEContract, Payscale FROM ('.$sql_pay_det.') tpd WHERE EmployeeRef = "'.$assign_no.'"';

---

编辑-问题2

由于具有重复的代码（mysql_fetch_assoc（）和mysql_fetch_array（）），使用mysql_fetch_assoc()之后， moves the internal data pointer ahead您只会在数据集中获得第二行。 因此，当您执行mysql_fetch_array() ，将获得除第一行以外的每一行。

    //Get payroll transactions
    ...
    $row_pay = mysql_fetch_assoc($rs_pay);

    //Get payroll detail recordset
    ...

        while($row_pay = mysql_fetch_array($rs_pay))
          {
                ...
                $row_pay_det2 = mysql_fetch_assoc($rs_pay_det2);

            while($row_pay_det2 = mysql_fetch_array($rs_pay_det2))
            {
                ...
                }
            }
        }

您需要删除- $row_pay = mysql_fetch_assoc($rs_pay); ＆ $row_pay_det2 = mysql_fetch_assoc($rs_pay_det2);