Question

我的设置表有setactive（字段），其中包含2个已知值：0或1

如何通过一个查询对字段setsactive get：计算值为＆＃34; 0＆＃34;并计算值为＆＃34; 1＆＃34;

的行

$stmt = $conn->prepare('SELECT setsid, setsname, setsactive, setstype
FROM settings WHERE setsactive = ?');
$setsactive = 0;
$stmt->bindValue(':setsactive', $setsactive, PDO::PARAM_INT);
$stmt->execute();   
echo $rows_set_active = $stmt->rowCount();
$setsactive1 = 1;
$stmt->bindValue(':setsactive', $setsactive1, PDO::PARAM_INT);
$stmt->execute();   
echo $rows_set_deactive = $stmt->rowCount();

感谢

更新了＆gt;删除第二个查询

Answer 1

尝试以下方法：

SELECT
    setsactive,
    COUNT(1) AS totalCount
FROM settings
GROUP BY setsactive

或

SELECT
    setsactive,
    SUM( IF(setsactive = 1, 1, 0) ) AS activeCount,
    SUM( IF(setsactive = 0, 1, 0) ) AS deactiveCount
FROM settings

Answer 2

SELECT setsactive, count(*) cnt FROM settings GROUP BY setsactive

否 - 如果您坚持完全错误计算方式 - 您可以在一次通话中运行这两个错误的查询。满意吗？

一旦PDO查询获取已知字段值？

2 个答案: