Extracting two columns from different tables in mysql

Question

How can I join two sql queries

 $sql = "SELECT Wpm FROM tableA limit 26"; and 
 "SELECT Rpm FROM tableB";

into one, and echo the results in the code below? I just want to display the two columns side by side in a table. I am not sure if the word "join" is the right one here. Thanks!

  <table class="tbresult">
        <tr>
            <th>Wpm</th>
            <th>Rpm</th>
        </tr>

        <?php

      include ("config.php");

****   $sql = "SELECT Wpm FROM tableA limit 26"; 
AND 
"SELECT Rpm FROM tableB";******


      $result = $conn->query($sql);
      if ($result->num_rows > 0) {

      $counter = 3;

       while($Row = $result->fetch_assoc()) 
       {
            echo "<tr><td>" . $Row["Wpm"] . "</td><td>" . $Row["Rpm"] . "</td></tr>";

                $counter++;
                if($counter % 33 == 0) { ?>
    </table>

    <table class="tbresult">
        <tr>
            <th>Wpm</th>
            <th>Rpm</th>
        </tr>

        <?php }
        }
    echo "</table>";

    } else { echo "0 results"; }
    $conn->close();
    ?>

Answer 1

I think you are looking for a "Cross Join" - a cross join produces a "carthesian product". This means it multiplies the rows of "Table A" and "Table B":

SELECT Wpm, Rpm FROM tableA cross join tableB 

(details here: https://www.w3resource.com/sql/joins/cross-join.php )

Answer 2

 $sql = "SELECT Wpm FROM tableA limit 26";
 $sql = "SELECT Rpm FROM tableB";

It means the second query runs every time because first variable replaced by second.

For this you need to run separate for first and second query.

Answer 3

if columns are same and equal use UNION here . else its better to use JOINs than 2 select and fetch them. anyway your first $sql are replaced by second...