Question

I get a string from java: “2011-11-25 08:16:50”
post_date column is TIMESTAMP
But the following query gives no results. What is the error?

$date2 = $_POST['Date'];

$result= mysql_query("Select * FROM (Select * FROM user WHERE latitude > $minLat AND latitude < $maxLat AND longitude > $minLon AND longitude < $maxLon AND post_date > $date2 ORDER BY post_date DESC LIMIT $amount1) a ORDER BY post_id");

while($results = mysql_fetch_assoc($result)) 
    $output[]=$results;

print(json_encode($output));
mysql_close();

Answer 1

You must single-quote dates in MySQL. Additionally, since you are acquiring it directly from $_POST, you are advised to escape it with mysql_real_escape_string() first.

$result= mysql_query("
  Select * FROM (
    Select * FROM user 
    WHERE
      latitude > $minLat 
      AND latitude < $maxLat 
      AND longitude > $minLon 
      AND longitude < $maxLon 

      -- Surround $date2 with quotes
      AND post_date > '$date2'
    ORDER BY post_date DESC LIMIT $amount1) a
  ORDER BY post_id");