查看MySQL查询是否有结果的条件？

Question

我想创建一个条件，如果有结果则返回true。我该怎么做？

$result = mysql_query("SELECT * FROM `Groups` WHERE `City` = '$city2' LIMIT 12 OFFSET 6");


if (the condition) {

while($row = mysql_fetch_array( $result )) { ?>
    <a href="/?ciudad=<?php echo $city; ?>&colegio=<?php echo $row['Group']; ?>" class="<?php if ($group == $row['Group']) { echo "selected"; } ?>"><?php echo $row['Group']; ?></a>  <?
    }   
}

由于

Answer 1

if (mysql_num_rows($result) > 0)

Answer 2

应该有类似的东西：

if ($result.size > 0) {
  // do this
}