PHP PDO 如何显示 top SQL 计数

Question

我有多个“所有者”，我想一起计数并显示最高所有者，我想出了 SQL 语句，但我不确定如何在 php 中显示最高计数？ 更难的是，大多数“所有者”条目都是空白的，我想排除所有空白的条目并将它们计入他们自己的陈述中，这就是我目前所拥有的:

$GMCB = $DBH->query('SELECT owner, count(owner) from griefprevention_claimdata group by owner ORDER BY count(owner) DESC LIMIT 1');

$GMCB->setFetchMode(PDO::FETCH_ASSOC);

while($row = $GMCB->fetch()) {
echo " - " . $row['owner'] . "\n";
}

Answer 1

请尝试这个并在 SQL 中使用别名来计算查询中的所有者。要排除空白条目，您可以在 where 子句中使用 is not null

 $GMCB = $DBH->query('SELECT owner, count(owner) as top_owner from 
 griefprevention_claimdata where owner is not null group by owner 
 ORDER BY count(owner) DESC LIMIT 1');

$GMCB->setFetchMode(PDO::FETCH_ASSOC);

while($row = $GMCB->fetch()) {
   echo  $row['owner '] ." - " . $row['top_owner '] . "\n";
}