Question

I have a very simple query but I need to make another query inside it. I have very little knowledge of SQL and PHP so I want to ask your help.

$result = mysql_query("SELECT * FROM img");
while ($row = mysql_fetch_assoc($result))
{
   $imgName = $row['name'];
   $catID = $row['catid'];
   // Problem
   // Need to get category NAME from category ID
   $result2 = mysql_query("SELECT name FROM cat WHERE id = $catID");
   while ($row2 = mysql_fetch_assoc($result2))
   {
      $catName = $row2['name'];
   }

   echo "Image: $imgName <br />";
   echo "Category: $catName";
}

Answer 1

This looks to be a simple JOIN to get the category name. You can use a single query:

SELECT
  img.id AS imgId,
  img.name AS imgName,
  cat.name AS catName
FROM img JOIN cat ON img.catid = cat.id

Replace your initial query with the above, and it will eliminate the need for the inner query.