找到阵列的while循环最小值从MySQL查询

Question

返回我有这样一个查询：

select * from posts p where p.post like '%cadillac%' ORDER BY p.upvotes DESC, 
p.unix_timestamp DESC LIMIT 20 

现在，同时通过阵列循环，我需要找到最小unix_timestamp值。例如：

$counter = 0; 
while($row = $result->fetch_assoc()){ 

// what do i do here to find the minimum timestamp value 

$counter = $counter + 1; 
} 

请指教。

Answer 1

$counter = 0; 
$min_timestamp = 0; 
while($row = $result->fetch_assoc()){ 

    //check if min hasn't been set OR if the current timestamp is less than the min 
    if(!$min_timestamp || ($row['unix_timestamp'] < $min_timestamp)) { 
     //store this timestamp as the current min 
     $min_timestamp = $row['unix_timestamp']; 
    } 

    //$counter = $counter + 1; 
} 
//once we reach here, min_timestamp will hold the minimum timestamp found 

Answer 2

您可以在SQL

select MIN(unix_timestamp) from posts p where p.post like '%cadillac%' 

Answer 3

做到这一点，下面的工作：

$counter = 0; 
$min_value; 
while($row = $result->fetch_assoc()){ 
    $min_value = is_null($min_value) || $min_value > $row['unix_timestamp'] ? $row['unix_timestamp'] :$min_value ; 

    $counter = $counter + 1; 
}