具有多个条件的SELECT

Question

我在php中有多条件查询

$query = sprintf("SELECT * FROM `booking` WHERE `rid` = ".$rid." AND `check_in_date` = ".$check_in_date." AND `check_out_date` = ".$check_out_date);

打印查询时，我希望它像这样

SELECT * FROM `booking` WHERE `rid` = 1 AND `check_in_date` = '2015-10-10' AND `check_out_date` = '2015-10-11'

Answer 1

在查询中，缺少日期引用（日期应视为字符串（varchar）：

$rid = '--';
$check_out_date = $check_in_date = ' 2005-12-12 ';
    $query = "SELECT * FROM `booking` WHERE `rid` = '".$rid."' ";
    $query .= " AND `check_in_date` = '".$check_in_date."' ";
    $query .= " AND `check_out_date` = '".$check_out_date . "';"; 

    echo $query;

SELECT * FROM booking WHERE rid =＆＃39; - ＆＃39;和check_in_date =＆＃39; 2005-12-12＆＃39;和check_out_date =＆＃39; 2005-12-12＆＃39;