Ndtyjky

My contents of website are display from a table (ex. ContentTable) with pure Ajax. There are 5 pages.
My problem is that, I would like to use another table, but ONLY on page 3.
For example:

ContentTable:

pageid | header       | content       |...

  1    |  "Welcome"   | "Main Page"   |...

  3    |     AnotherTable(fruits)     |...

Table2

id | type      | description

1  | fruit     | "In botany, a fruit is the...."

2  | vegetable | "Vegetables are parts of...."

Table3

id | type | name | description

1  | fruit| apple| "An apple is a sweet...."

...

In this case I would like to display apple on page 3.

Example for the SQL:

I get the current page like:
$GetPageID = isset($_GET['pg']);

The basic sql is like:
SELECT header, content FROM content WHERE pageid=$GetPageID

/* run extra SQL query */

if ($GetPageID == 3){

$SQL = "SELECT type, description From Table2;"

$result = mysqli_query($conn, $sql);

if (mysqli_num_rows($result) > 0) {

    while($row = mysqli_fetch_assoc($result)) {

        echo 'Type: '.$row["type"].'<br>Description: '.$row["description"].'<br><a href="...">Show more about'.$row["type"].'</a>';

    }

} else {

    echo "the table is empty";

}

}

But I would like to use just a single query.