MySQL Limit 2 如何选择第二行

Question

$sMonOperationHours = "SELECT * FROM ".COMPANY_OPERATION_HOURS_TBL." WHERE 
f_company_id = '$g_companyid' AND f_day = 'MON' LIMIT 2";
$rsMonOperationHours = mysql_query($sMonOperationHours);
$rowMonOperationHours = mysql_fetch_array($rsMonOperationHours);
$iMonStartTime = $rowMonOperationHours['f_start_time'];
$iMonStartTime2 = ???;
$iMonEndTime = $rowMonOperationHours['f_end_time'];
$iMonEndTime2 = ???;

将 SQL 查询结果限制为 2 后，如何选择第二行的 f_start_time 和 f_end_time？

Answer 1

您可以使用 LIMIT 和 OFFSET 来获取第二个结果

$sMonOperationHours = "SELECT * FROM ".COMPANY_OPERATION_HOURS_TBL." WHERE 
f_company_id = '$g_companyid' AND f_day = 'MON' LIMIT 1 OFFSET 1";
$rsMonOperationHours = mysql_query($sMonOperationHours);
$rowMonOperationHours = mysql_fetch_array($rsMonOperationHours);
$iMonStartTime = $rowMonOperationHours['f_start_time'];
$iMonEndTime = $rowMonOperationHours['f_end_time'];

另一种方法是，如果您想要两个结果，那就是:

$sMonOperationHours = "SELECT * FROM ".COMPANY_OPERATION_HOURS_TBL." WHERE 
f_company_id = '$g_companyid' AND f_day = 'MON' LIMIT 2";
$rsMonOperationHours = mysql_query($sMonOperationHours);
$rowsData = array();
$i = 0;
while ($row = mysql_fetch_array($rsMonOperationHours)) {
    $rowsData[$i] = array();
    $rowsData[$i][] =  $row['f_start_time'];
    $rowsData[$i][] =  $row['f_end_time'];
    $i++;
}

所有数据将保存在 rowsData 中，其中包含数组中的结果。