php - 如何在php中执行多个计数查询

Question

我从一张表中执行了 4 次计数查询。但我从所有查询中得到相同的输出。但实际值与表中不同。

这是我的 table 。

ID ||  notify_type     ||  status
__________________________________________

1  || resume_uploaded  ||    1

这是我的疑问:

$notify_query1 = "select count(*) from notify where status = 1 and notify_type = 'resume_uploaded'";
$row1 = mysqli_query($db_manager->connection,$notify_query1);
$rcount = mysqli_num_rows($row1);

$notify_query2 = "select count(*) from notify where status = 1 and  notify_type = 'detail_filled'";
$row2 = mysqli_query($db_manager->connection,$notify_query2);
$dcount = mysqli_num_rows($row2);

$notify_query3 = "select count(*) from notify where status = 1 and notify_type = 'job_detailed'";
$row3 = mysqli_query($db_manager->connection,$notify_query3);
$jcount = mysqli_num_rows($row3);

$notify_query4 = "select count(*) from notify where status = 1 and notify_type = 'msg_sent'";
$row4 = mysqli_query($db_manager->connection,$notify_query4);
$mcount = mysqli_num_rows($row4);

我从所有四个查询中获取输出1: 请帮助我。

Answer 1

使用fetch_row()而是 mysqli_num_rows()。

$result = $db->query("select count(*) from notify where status = 1 and notify_type = 'resume_uploaded'");
$row = $result->fetch_row();
echo 'No of count: '. $row[0];