Question

I have this problem whereby I cannot display records from oracle database to my web application using PHP as a server side scripting language.Could someone kindly tell me where I could be doing wrong? I want by the end of the day to be able to achieve pagination and replace ROWNUM and rnum with variables that users can manipulate when moving fromm page to page.

     <?php  

    /* Connection string to Oracle view */  
    /* user is patients */  
    /* password is patients */  
    $conn=oci_connect('patients','patients','192.168.1.100/hosecare');  

    /* Query expected to do pagination and get records */  
    $qry="select *  
    from (select a.*, ROWNUM rnum  
    from (select BILL_NO,AK_NO,PAT_NAME,VOUCHER_DATE,USER_NAME,PAYMENT_AMT from patients    WHERE VOUCHER_DATE >='01-Sep-2011' AND VOUCHER_DATE <='26-Sep-2011' AND  SOURCE_LOCATION='KIAMBU CLINIC' ORDER BY VOUCHER_DATE)a
    where ROWNUM <=20)  
    where rnum >=10;";  


    $stid=oci_parse($conn,$qry);  
    oci_execute($stid);  

    /* Table begins here */  
    echo "<table border='1'>\n";  
    echo "<tr>\n";  

    /* Table Column headers */  
    echo "<td>".'<h3>BILL NO</h3>'."</td>";  
    echo "<td>".'<h3>ACCOUNT NO</h3>'."</td>";  
    echo "<td>".'<h3>PATIENT NAME</h3>'."</td>";  
    echo "<td>".'<h3>VOUCHER DATE</h3>'."</td>";  
    echo "<td>".'<h3>USER NAME</h3>'."</td>";  
    echo "<td>".'<h3>PAYMENT AMOUNT</h3>'."</td>";  
    echo "</tr>\n";  

    /* Populating Table cells with records resulting from the pagination query */  
     while($row=oci_fetch_array($stid,OCI_ASSOC+OCI_RETURN_NULLS)) {  
    echo "<tr>\n";  
    foreach($row as $item){  
            echo "<td>".($item !==null ? htmlentities($item,ENT_QUOTES) :  "&nbsp;")."    </td>\n";
    }
    echo "</tr>\n";
    }

    echo "</table>\n";

    ?>

Answer 1

I realized the problem came about because of the preceding unnecessary space before SOURCE_LOCATION in the query and the unnecessary semicolon (;) at the end of the query.

The code perfectly works the way I wanted.Thanks to each and everyone of you for the contribution you made towards giving Answers to the Question.

I appreciate all your efforts.

The working code now looks as follows;

       <?php

        //Connection string to Oracle view
        //user is patients
        //password is patients
        $conn=oci_connect('patients','patients','192.168.1.100/hosecare');
        //Query expected to do pagination and get records

        //$page will vary depending on which page the user has accessed.

        $page=1;
        $pageSize=20;
        $maxrowfetch=(($page * $pageSize) + 1);
        $minrowfetch=((($page - 1) * $pageSize) + 1);

        //QUERY WORKING...MODIFIED TO FIT USER REQUIREMENTS
        $qry="select * 
        from (select a.*, ROWNUM rnum
        from (select BILL_NO,AK_NO,PAT_NAME,VOUCHER_DATE,USER_NAME,PAYMENT_AMT from smart WHERE VOUCHER_DATE >='20-Sep-2011' AND VOUCHER_DATE <='26-Sep-2011' AND SOURCE_LOCATION='KIAMBU CLINIC' ORDER BY BILL_NO ASC)a
        where ROWNUM <="."$maxrowfetch".")
        where rnum >="."$minrowfetch"."";


        //QUERY NOT WORKING...THE 2 SPACES BEFORE SOURCE_LOCATION IN THE QUERY WAS THE PROBLEM
        /***
        $qry="select * 
        from (select a.*, ROWNUM rnum
        from (select BILL_NO,AK_NO,PAT_NAME,VOUCHER_DATE,USER_NAME,PAYMENT_AMT from patients WHERE VOUCHER_DATE >='01-Sep-2011' AND VOUCHER_DATE <='26-Sep-2011' AND  SOURCE_LOCATION='KIAMBU CLINIC' ORDER BY VOUCHER_DATE ASC)a
        where ROWNUM <=20)
        where rnum >=10";
        ***/


        //QUERY WORKING...1 SPACE BEFORE SOURCE_LOCATION IN QUERY
        /***
        $qry="select * 
        from (select a.*, ROWNUM rnum
        from (select BILL_NO,AK_NO,PAT_NAME,VOUCHER_DATE,USER_NAME,PAYMENT_AMT from patients WHERE VOUCHER_DATE >='01-Sep-2011' AND VOUCHER_DATE <='26-Sep-2011' AND  SOURCE_LOCATION='KIAMBU CLINIC' ORDER BY VOUCHER_DATE ASC)a
        where ROWNUM <=20)
        where rnum >=10";
        ***/


        $stid=oci_parse($conn,$qry);
        oci_execute($stid);

        //Table begins here
        echo "<table border='1'>\n";
        echo "<tr>\n";

        //Table Column headers
        echo "<td>".'<h3>BILL NO</h3>'."</td>";
        echo "<td>".'<h3>ACCOUNT NO</h3>'."</td>";
        echo "<td>".'<h3>PATIENT NAME</h3>'."</td>";
        echo "<td>".'<h3>VOUCHER DATE</h3>'."</td>";
        echo "<td>".'<h3>USER NAME</h3>'."</td>";
        echo "<td>".'<h3>PAYMENT AMOUNT</h3>'."</td>";
        echo "</tr>\n";

        //Populating Table cells with records resulting from the pagination query
        while($row=oci_fetch_array($stid,OCI_ASSOC+OCI_RETURN_NULLS)) {
        echo "<tr>\n";


            echo "<td>";
            echo $row["BILL_NO"];
            echo "</td>";
            echo "<td>";
            echo $row["AK_NO"];
            echo "</td>";
            echo "<td>";
            echo $row["PAT_NAME"];
            echo "</td>";
            echo "<td>";
            echo $row["VOUCHER_DATE"];
            echo "</td>";
            echo "<td>";
            echo $row["USER_NAME"];
            echo "</td>";
            echo "<td>";
            echo $row["PAYMENT_AMT"];
            echo "</td>";
            echo "</tr>";


        }

        echo "</table>\n";

        echo "MAX ROW FETCH ".$maxrowfetch."<br>";
        echo "MIN ROW FETCH ".$minrowfetch."<br>";
        echo $qry."<br>";

         ?>