为什么不在上周提取数据

Question

为什么这不能用于从上周提取数据？

if($_GET['reminder'] == 'lastweek') {
$lastweek = date('Y-m-d', strtotime('last sunday'));
$query = "SELECT * FROM contacttodo,contacts WHERE contacttodo.contacts_id = contacts.ID AND contacttodo.reminder BETWEEN '$lastweek' AND '$lastweek' - INTERVAL 6 DAY ORDER BY contacttodo.reminder ASC"; 

Answer 1

这是BETWEEN的定义：

expr BETWEEN min AND max

所以你应该把较小的值（最小值）放在第一位：

BETWEEN '$lastweek' - INTERVAL 6 DAY AND '$lastweek'

'$lastweek' - INTERVAL 6 DAY ORDER小于'$lastweek'