How to display all results of one PHP variable together from mysql? - php

Question

I am having an unexpected ton of difficulty trying to return all the currencies that a store accepts from the currency(banking) table.
The results I want should be:
Store name: Test
Store type: Grocery Store
Currency accepted: Bitcoin, Euros, Dollars
The results I get (when I remove GROUPBY Store) are:
Store name: Test
Store type: Grocery Store
Currency accepted: Bitcoin
Store name: Test
Store type: Grocery Store
Currency accepted: Euros
Store name: Test
Store type: Grocery Store
Currency accepted: Dollars
When I remove groupby store, then I only get the first result above (just the bitcoin result for currency)
There are 3 rows for the store id for currency, but it is only returning the first row's value (Bitcoin) since I am using GROUPBY and only one one result for the Test Store (But all 3 currencies for that store). I can't seem to get it to pull all 3 matching rows for the store id in that table into my results so that I get the 3 currencies returned.
I know the query is good from other tests, but I just don't know how to adjust the code below so that all currencies are returned and listed for the "Currency Accepted" table row on the page.
Here is the relevant code:
$query = "(
SELECT * FROM store
LEFT JOIN store_banking SB ON store.id=SB.store_id
LEFT JOIN banking B ON SB.banking_id = B.id
LEFT JOIN store_gaming SG ON store.id=SG.store_id
LEFT JOIN gaming G ON SG.gaming_id = G.id
WHERE
('$type' IS NULL OR '$type' = '' OR G.type = '$type')
And
('$currency' IS NULL OR '$currency' = '' OR B.currency= '$currency')
GROUP BY store.name
Order by store.name
)";
$result = mysqli_query($link, $query);
echo "<table border='1' cellpadding='5' cellspacing='5'>
<tr>
<th>Store Name</th>
<th>Type</th>
<th>Currency Accepted:</th> //need this to show all 3 matches; only showing 1
</tr>";
/* fetch associative array */
while ($row = mysqli_fetch_assoc($result)) {
echo "<tr>";
echo "<td>" . $row['name'] . "</td>";
echo "<td>" . $row['type'] . "</td>";
echo "<td>" . $row['currency'] . "</td>"; //only returns first results row :(
echo "</tr>";
}
/* free result set */
mysqli_free_result($result);
echo "</table>";
mysqli_close($link);
?>

Answer 1

I think a GROUP_CONCAT might do the trick for you.
And when you select with GROUP_CONCAT it's often best to set an alias on the select to easier reference it later.
For example:
SELECT GROUP_CONCAT(currency) as currency