用不同的值更新多行的同一列

Question

我想每天运行cron job 来更新dadmin_reminder_date、dshipment_date 和darrival_date。我需要将icmd_days 添加到每个当前日期。

例如。对于第二行（无法上传图片） 输出应该是 old(05/07/2015)/new(06/04/2015),old(05/07/2015)/new(06/04/2015),old(05/15/2015)new(06/12/2015)。此行的icmd_days = 28。每行都有不同的天数或icmd_days 值。

这是我目前拥有的php 代码，但是它更新每一行的天数相同。

require '../commonincludefiles.php';

global $conn;

$row_string = '';

$Today = date("Y-m-d");

global $conn;



$sub_query = "SELECT bisubscriptionID,dshipment_date,darrival_date,icmd_days,dadmin_reminder_date,vsubscriptionstatus FROM tbl_subscription WHERE darrival_date <= '".$Today."' AND edelete='0' AND vsubscriptionstatus='Shipped'";
$sub_res = mysqli_query($conn,$sub_query);
    $temp = array();
    if (mysqli_num_rows($sub_res) >0) {
    $i=0;
    while($row =  mysqli_fetch_array($sub_res)){
        $temp[$i]['bisubscriptionID'] = $row['bisubscriptionID'];
        $temp[$i]['icmd_days'] = $row['icmd_days'];
        $temp[$i]['new_dshipment_date'] = date('Y-m-d', strtotime($row['dshipment_date'] . '+ '.$row['icmd_days'].'days'));
        $i++;



$new_vsubscriptionstatus = 'Active';


$update_query = "UPDATE tbl_subscription SET vsubscriptionstatus='" . $new_vsubscriptionstatus . "',dshipment_date='" . $new_dshipment_date . "',tmodifydate=NOW() WHERE darrival_date <= '".$Today."' AND edelete='0' AND vsubscriptionstatus='Shipped' AND bisubscriptionID= $bisubscriptionID";
$update_res = mysqli_query($conn, $update_query);
}
}
?>

请对我放轻松。我以前从未编写过代码，并获得了一个有趣的网站。

Answer 1

因此，您可以将更新语句更改为如下所示，并一起删除您的选择：

UPDATE tbl_subscription 
SET vsubscriptionstatus = '" . $new_vsubscriptionstatus . "'
    ,dshipment_date=DATEADD(d,icmd_days,shipment_date)
    ,tmodifydate=NOW() 
WHERE darrival_date <= '".$Today."' 
AND edelete='0' 
AND vsubscriptionstatus='Shipped' 
AND bisubscriptionID= $bisubscriptionID

Date add 会自动将 ICMD_DAYS 中的天数添加到 shipping_date 中，并相应地设置您的日期。

您还可以删除 SQL 中内置 GETDATE() 函数的今天逻辑：

UPDATE tbl_subscription 
SET vsubscriptionstatus = '" . $new_vsubscriptionstatus . "'
    ,dshipment_date=DATEADD(d,icmd_days,shipment_date)
    ,tmodifydate=NOW() 
WHERE darrival_date <= GETDATE()
AND edelete='0' 
AND vsubscriptionstatus='Shipped' 
AND bisubscriptionID= $bisubscriptionID

我猜你使用的是 MySQL 而不是 SQL Server。以下是如何在 MySQL 中执行此操作。我还为我在服务器上创建的名为 stackoverflow 的模式编写了示例代码。

我包含了 drop table，以防您想在任何调整后重新运行代码。

USE stackoverflow;

DROP TABLE `tbl_subscription`;

CREATE TABLE `tbl_subscription` (
  `dshipment_date` DATE NULL,
  `icmd_days` INT NULL,
  `darrival_date` DATETIME NULL,
  `edelete` BIT NULL,
  `csubscriptionstatus` VARCHAR(45) NULL,
  `bisubscriptionID` BIGINT NULL,
  `dadmin_reminder_date` DATE NULL,
  `dprevious_shipment_date` DATE NULL,
  `tmodifydate` DATETIME NULL
  )
ENGINE = InnoDB;


INSERT INTO `tbl_subscription`
    (
    dshipment_date
    ,icmd_days
    ,darrival_date
    ,edelete
    ,csubscriptionstatus
    ,bisubscriptionID
    ,dadmin_reminder_date
    ,tmodifydate
    )

SELECT 
    '2015-04-30' as dshipment_date
    ,30 as icmd_days
    ,null as darrival_date
    ,0 as edelete
    ,'Shipped' as csubscriptionstatus
    ,20150001 as bisubscriptionID
    ,null as dadmin_reminder_date
    ,NOW() as tmodifydate 
UNION ALL
SELECT 
    '2015-05-10' as dshipment_date
    ,25 as icmd_days
    ,null as darrival_date
    ,0 as edelete
    ,'Shipped' as csubscriptionstatus
    ,20150002 as bisubscriptionID
    ,null as dadmin_reminder_date
    ,NOW() as tmodifydate 
UNION ALL 
SELECT 
    '2015-04-10' as dshipment_date
    ,30 as icmd_days
    ,'2015-04-13' as darrival_date
    ,0 as edelete
    ,'Shipped' as csubscriptionstatus
    ,20150003 as bisubscriptionID
    ,null as dadmin_reminder_date
    ,NOW() as tmodifydate 
UNION ALL 
SELECT 
    '2015-05-25' as dshipment_date
    ,20 as icmd_days
    ,'2015-05-28' as darrival_date
    ,0 as edelete
    ,'Active' as csubscriptionstatus
    ,20150004 as bisubscriptionID
    ,null as dadmin_reminder_date
    ,NOW() as tmodifydate 
UNION ALL 
SELECT 
    '2015-04-27' as dshipment_date
    ,20 as icmd_days
    ,'2015-04-30' as darrival_date
    ,0 as edelete
    ,'Shipped' as csubscriptionstatus
    ,20150005 as bisubscriptionID
    ,null as dadmin_reminder_date
    ,NOW() as tmodifydate 
;

SELECT * FROM `tbl_subscription`;

SELECT dshipment_date,icmd_days,DATE_ADD(dshipment_date, INTERVAL icmd_days DAY) FROM `tbl_subscription`;


UPDATE `tbl_subscription`
SET dprevious_shipment_date = dshipment_date
    ,csubscriptionstatus = 'Active'
    ,dshipment_date=DATE_ADD(dshipment_date, INTERVAL icmd_days DAY)
    ,tmodifydate = NOW()
WHERE darrival_date <= NOW()
AND edelete='0' 
AND csubscriptionstatus='Shipped' 
/*AND bisubscriptionID= $bisubscriptionID -- this is not needed since we are not doing the loop anymore -- */
;

SELECT * FROM `tbl_subscription`;

但您需要的基本代码如下：

USE stackoverflow;
UPDATE `tbl_subscription`
SET dprevious_shipment_date = dshipment_date
    ,csubscriptionstatus = 'Active'
    ,dshipment_date=DATE_ADD(dshipment_date, INTERVAL icmd_days DAY)
    ,tmodifydate = NOW()
WHERE darrival_date <= NOW()
AND edelete='0' 
AND csubscriptionstatus='Shipped' 
/*AND bisubscriptionID= $bisubscriptionID -- this is not needed since we are not doing the loop anymore -- */

并且此代码将消除您的循环设置 csubscriptionstatus 值的需要。

我在您的表格中添加了一个字段 dprevious_shipment_date 作为日期，以便您可以跟踪上个月发货的时间，以防您需要它进行恢复，如果需要，您也可以将其从更新声明中删除。