如何从具有相同列名的多个表中检索数据

Question

I need help. I'm well aware that there are similar questions on (Google/stackoverflow) and I got many information from that helped me to move forward but I'm stuck somewhere, I think on "where' statement. Seems like I don't get it right that's the reason of this post.

I need to get data from many tables having same column name. Please below's my code I've written so far.

$result = $connection->query("select price.ID as id1, price.ID as id2 from tbladventure, tblafrica where price>='$pricefrom' and price <='$priceto'");

for ($i = 0;$i<$result->num_rows;$i++){
$row = $result->fetch_array(MYSQLI_NUM);
      echo $row['id1']."<br>";
      echo $row['id2']."<br>";
}

Below's the Web Interface

enter image description here

Answer 1

在where条件下使用tablename.columnname

$result = $connection->query("select price.ID as id1, price.ID as id2 from tbladventure, tblafrica where tbladventure.price>=".$pricefrom." and tblafrica.price <=".$priceto);

Answer 2

select price.ID as id1, price.ID as id2 from tbladventure, tblafrica where price>='$pricefrom' and price<='$priceto'

In your select, 1st ID should come from table "price". 2nd ID should come from table "price". Q: why would you do that ?

Then, you use "tbladventure" and "tblafrica", but select no rows from those tables.

You request seems very badly thought : what do you exactly need to do ?

What does request returns ? any error message ?