Display Multiple PHP Queries - php

Question

I need to display multiple queries (they can't be combined into one large query, at least I don't think so) together in a webpage. I'll explain a little about the queries to give an idea of the problem. I have a database in MySQL with 3 question tables of the same format linked to a response table via a classid. The response table is linked to an instructor table via an instructorid. I need to display a table showing all 3 question scores for each record existing for an instructor, with each table followed by some text indicating which question had the highest value as well as the least. I created a uniontbl view in MySQL which is a union query with fields ClassID, Average and TableName. What I have so far is:
$query2 = "SELECT `tbl_instructor`.`FirstName`,
`tbl_instructor`.`LastName`,
`tbl_term`.`TermID`,
`tbl_ucourse`.`Abbreviation`,
`tbl_ucourse`.`Series`,
`tbl_uquestion01`.`Average` AS `Q1`,
`tbl_uquestion02`.`Average` AS `Q2`,
`tbl_uquestion03`.`Average` AS `Q3`
FROM `tbl_instructor`
LEFT JOIN `undergrad`.`tbl_uresponse` ON `tbl_instructor`.`InstructorID` = `tbl_uresponse`.`InstructorID`
LEFT JOIN `undergrad`.`tbl_ucourse` ON `tbl_uresponse`.`CourseID` = `tbl_ucourse`.`CourseID`
LEFT JOIN `undergrad`.`tbl_Term` ON `tbl_UResponse`.`TermID` = `tbl_Term`.`TermID`
LEFT JOIN `undergrad`.`tbl_uquestion01` ON `tbl_uresponse`.`ClassID` = `tbl_uquestion01`.`ClassID`
LEFT JOIN `undergrad`.`tbl_uquestion02` ON `tbl_uresponse`.`ClassID` = `tbl_uquestion02`.`ClassID`
LEFT JOIN `undergrad`.`tbl_uquestion03` ON `tbl_uresponse`.`ClassID` = `tbl_uquestion03`.`ClassID`
WHERE CONCAT(LastName, ', ', FirstName, ' (', UserID, ')') = '{$instructor}'";
$query3 = "SELECT `tbl_instructor`.`FirstName`,
`tbl_instructor`.`LastName`,
`uniontbl`.`ClassID`,
`uniontbl`.`TableName`,
`tbl_uresponse`.`InstructorID`
FROM `tbl_Instructor`
LEFT JOIN `undergrad`.`tbl_uresponse` ON `tbl_instructor`.`InstructorID` = `tbl_uresponse`.`InstructorID`
LEFT JOIN `undergrad`.`uniontbl` ON `tbl_uresponse`.`ClassID` = `uniontbl`.`ClassID`
WHERE CONCAT(LastName, ', ', FirstName, ' (', UserID, ')') = '{$instructor}'
ORDER BY `uniontbl`.`Average` DESC
LIMIT 1";
$query4 = "SELECT `tbl_instructor`.`FirstName`,
`tbl_instructor`.`LastName`,
`uniontbl`.`ClassID`,
`uniontbl`.`TableName`,
`tbl_uresponse`.`InstructorID`
FROM `tbl_Instructor`
LEFT JOIN `undergrad`.`tbl_uresponse` ON `tbl_instructor`.`InstructorID` = `tbl_uresponse`.`InstructorID`
LEFT JOIN `undergrad`.`uniontbl` ON `tbl_uresponse`.`ClassID` = `uniontbl`.`ClassID`
WHERE CONCAT(LastName, ', ', FirstName, ' (', UserID, ')') = '{$instructor}'
ORDER BY `uniontbl`.`Average` ASC
LIMIT 1";
$result2 = mysqli_query($query2);
$result3 = mysqli_query($query3);
$result4 = mysqli_query($query4);
while($row2 = mysqli_fetch_assoc($result2))
{
echo "<br>";
echo"<table>";
echo "<tr>";
echo "<th>Q1</th>";
echo "<th>Q2</th>";
echo "<th>Q3</th>";
echo "</tr>";
echo "<tr>";
echo "<td>" . $row2['Q1'] . "</td>";
echo "<td>" . $row2['Q2'] . "</td>";
echo "<td>" . $row2['Q3'] . "</td>";
echo "</tr>";
echo"<br>";
echo "</table>";
while($row3 = mysqli_fetch_assoc($result3))
{
echo $row3['TableName'];
}
echo "<br>";
while($row4 = mysqli_fetch_assoc($result4))
{
echo $row4['TableName'];
}
echo "<br>";
}
So, how I've tried to tackle the problem is using the second and third queries to determine which questions had the highest and lowest score from the uniontbl view and displaying that after each table containing the question scores. The problem is that the second and third queries ONLY display after the first table (or record) and do not show at all after that. I have a feeling that the problem lies in the actual queries themselves but I can't think of another way to solve the problem. P.S. I know my code isn't the best (echoing HTML and such) but I'm just trying to get it to work...

Answer 1

After you print the first row of $result2, you fetch all the rows of $result3 and $result4. So after you print the second row of $result2, there's nothing left to fetch from the second and third queries.
Since the second and third queries use LIMIT 1, there's just one row for each of them. You could fetch them each once, and then display that row after each row of the first query. But I'm not sure why you need to display the same thing multiple times. Maybe you should just show the output of these two queries once, at the beginning or end, rather than after each row.
Also, do you really want to create a whole new table for each row of $result2? Usually each row is just a row in one big table, not a separate table with just one row for each row from the DB.