連續獲取MySQL數據的最佳方式？

Question

這就是我現在使用的。我成功獲取第一個查詢，但是我無法從第二個查詢中檢索任何數據。第二個查詢的所有變量都是未定義的。

$sql = "SELECT * FROM history WHERE ended=1 ORDER BY chance ASC LIMIT 1"; 
$result = $conn->query($sql); 
$row = mysqli_fetch_assoc($result); 
$luck_steamid = $row["winner"]; 
$luck_total = $row["total"]; 
$luck_chance = $row["chance"]; 
$luck_round = $row["id"]; 
$sql = "SELECT * FROM users WHERE steamid=".$luck_steamid; 
$result = $conn->query($sql); 
$row = mysqli_fetch_assoc($result); 
$luck_avatar = $row["avatar"]; 
$luck_name = $row["name"]; 
$luck_profile = $row["profile"]; 

Answer 1

只是把它拿來一次性使用連接：

$sql = "SELECT history.winner, history.total, history.chance, history.id, users.avatar, users.name, users.profile FROM history JOIN users ON history.winner = users.steamid WHERE ended=1 ORDER BY chance ASC LIMIT 1"; 
$result = $conn->query($sql); 
$row = mysqli_fetch_assoc($result); 
$luck_steamid = $row["winner"]; 
$luck_total = $row["total"]; 
$luck_chance = $row["chance"]; 
$luck_round = $row["id"]; 
$luck_avatar = $row["avatar"]; 
$luck_name = $row["name"]; 
$luck_profile = $row["profile"];