Using PHP to get data from multiple database tables - php

Question

I am trying to query five tables. I am able to query one of the tables with
$query = "SELECT * FROM Stats_player WHERE player='$user'";
However, when I try to query another table with
$query = "SELECT * FROM Stats_player, Stats_block WHERE player='$user'";
the website breaks. Here is the code I am using to echo the data on the screen
<?php
if ($result = $mysqli->query($query)) {
echo "<img src=\"https://minotar.net/avatar/{$user}/100\"><h1>{$user}</h1><br/>";
while ($row = $result->fetch_assoc()) {
//variables
$play_time = $row['playtime']/3600;
$play_time = round($play_time, 1);
$xpgained = $row['xpgained'];
$damagetaken = $row['damagetaken'];
$toolsbroken = $row['toolsbroken'];
$itemscrafted = $row['itemscrafted'];
$itemseaten = $row['omnomnom'];
$commandsused = $row['commandsdone'];
$teleports = $row['teleports'];
$itemspickedup = $row['itempickups'];
$itemsdroped = $row['itemdrops'];
$lastseen = date("F j, Y ", strtotime($row['lastjoin']));
//end of variables
echo "<p>Time on Server: {$play_time} HRS</p>";
echo "<p>Last Seen: {$lastseen}";
echo "<p>Commands Used: {$commandsused}";
echo "<p>XP Gained: {$xpgained}";
echo "<p>Blocks broken: {$row['blockID']}"; //this is data from the table Stats_block
}
$result->free();
}
$mysqli->close();
?>
Any ideas on how I might do this?
Table structor of Stats_player:
| counter | player | Playtime |
Stats_block is:
| counter | player | blockID |

Answer 1

$query = "SELECT * FROM Stats_player, Stats_block WHERE player='$user'"
That's very likely wrong. You should use a JOIN operator.
Here, you are just doing a cartesian products of the two tables, that's hardly what you want. And that may overrun your resource (memory etc.) if the tables have a lot of rows.
Something like
$query = "SELECT * FROM Stats_player p, Stats_block b
WHERE p.block_id = b.id AND p.player='$user'"
or
$query = "SELECT * FROM Stats_player p INNER JOIN Stats_block b ON p.block_id = b.id
WHERE p.player='$user'"
or maybe LEFT OUTER JOIN...
The exact query will depend on your schema.

Answer 2

Without seeing the structure of both tables, something like this could work.
SELECT columnList
FROM Stats_player a
LEFT JOIN Stats_block b ON b.player = a.player
WHERE a.player = '$user'

Answer 3

Have you tried something like this:
SELECT
table1.field1, table1.field2, table2.field1, table2.field2
FROM
table1, table2
WHERE
table1.field1 = " " and table2.field1 = " ";