Php MySQL-更改一行的时间值以匹配同一表中另一行的时间值
我有几位顾问记录他们的工作开始/结束时间。因为他们有两小时的最低费用，我需要确保我正确计算他们的工作时间。当它们在同一站点上有连续作业时，问题就会出现，两个作业之间的空闲时间介于15到60分钟之间 下面是按cid、作业日期、开始时间排序的示例表的查询结果。对于此特定示例，所有作业时间条目均为同一天：Php MySQL-更改一行的时间值以匹配同一表中另一行的时间值,php,mysql,mysqli,Php,Mysql,Mysqli,我有几位顾问记录他们的工作开始/结束时间。因为他们有两小时的最低费用，我需要确保我正确计算他们的工作时间。当它们在同一站点上有连续作业时，问题就会出现，两个作业之间的空闲时间介于15到60分钟之间 下面是按cid、作业日期、开始时间排序的示例表的查询结果。对于此特定示例，所有作业时间条目均为同一天： id job_num cid job_date start_time end_time 19 130513-20 6 05/13/2013 2013-
id job_num cid job_date start_time end_time
19 130513-20 6 05/13/2013 2013-05-13 13:30:00 2013-05-13 16:30:00
10 130513-10 7 05/13/2013 2013-05-13 11:00:00 2013-05-13 13:00:00
16 130513-17 13 05/13/2013 2013-05-13 14:45:00 2013-05-13 15:30:00
15 130513-16 16 05/13/2013 2013-05-13 14:45:00 2013-05-13 16:15:00
18 130513-19 34 05/13/2013 2013-05-13 11:15:00 2013-05-13 12:15:00
8 130513-08 44 05/13/2013 2013-05-13 12:00:00 2013-05-13 14:30:00
6 130513-06 47 05/13/2013 2013-05-13 11:00:00 2013-05-13 12:00:00
9 130513-09 47 05/13/2013 2013-05-13 12:00:00 2013-05-13 12:30:00
14 130513-15 47 05/13/2013 2013-05-13 14:30:00 2013-05-13 15:15:00
3 130513-03 50 05/13/2013 2013-05-13 09:00:00 2013-05-13 10:45:00
7 130513-07 50 05/13/2013 2013-05-13 11:00:00 2013-05-13 12:00:00
11 130513-11 50 05/13/2013 2013-05-13 13:00:00 2013-05-13 14:30:00
17 130513-18 50 05/13/2013 2013-05-13 15:00:00 2013-05-13 16:15:00
2 130513-02 52 05/13/2013 2013-05-13 09:30:00 2013-05-13 10:30:00
4 130513-04 52 05/13/2013 2013-05-13 10:30:00 2013-05-13 11:00:00
5 130513-05 52 05/13/2013 2013-05-13 11:00:00 2013-05-13 13:00:00
12 130513-12 52 05/13/2013 2013-05-13 14:00:00 2013-05-13 14:45:00
13 130513-13 52 05/13/2013 2013-05-13 15:00:00 2013-05-13 17:00:00
20 130513-21 61 05/13/2013 2013-05-13 11:00:00 2013-05-13 12:00:00
1 130513-01 70 05/13/2013 2013-05-13 14:30:00 2013-05-13 15:15:00
我试图完成的是更新特定行的结束时间（job_num），使其等于同一顾问（cid）查询中下一个job_num的结束时间，但前提是差异（空闲时间）在第一个作业的结束时间和下一个作业的开始时间之间我假设
id主键，并且它是自动递增的
我有这个更新
查询：
UPDATE table T1
SET T1.end_time = (
SELECT T2.end_time
FROM table T2
WHERE T2.cid = T1.cid
AND T2.job_date = T1.job_date
AND T2.id > T1.id
AND T2.start_time <= DATE_ADD(T1.end_time, INTERVAL 30 MINUTE)
ORDER BY T2.id ASC
LIMIT 1
)
WHERE id IN (
SELECT DISTINCT T1.Id
FROM table T1
INNER JOIN table T2 ON T2.cid = T1.cid
AND T2.job_date = T1.job_date
AND T2.id > T1.id
AND T2.start_time <= DATE_ADD(T1.end_time, INTERVAL 30 MINUTE)
WHERE T1.job_date = @date
);
DECLARE id INT(11);
DECLARE newEndDate DATETIME;
DECLARE noMoreRows BIT(1);
DECLARE customCursor CURSOR FOR
SELECT T1.Id
, CAST(SUBSTRING_INDEX(GROUP_CONCAT(T2.start_date ORDER BY T2.Id ASC), ',', 1) AS DATETIME) AS NewEndDate
FROM table T1
INNER JOIN table T2 ON T2.cid = T1.cid
AND T2.job_date = T1.job_date
AND T2.id > T1.id
AND T2.start_time <= DATE_ADD(T1.end_time, INTERVAL 30 MINUTE)
WHERE T1.job_date = @date
GROUP BY T1.Id
HAVING NewEndDate <> '' OR NewEndDate IS NOT NULL;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET noMoreRows = 1;
OPEN customCursor;
customLoop: LOOP
FETCH customCursor INTO id, newEndDate;
IF noMoreRows THEN
LEAVE customLoop;
END IF;
UPDATE table
SET end_date = newEndDate
WHERE id = id;
END LOOP customLoop;
CLOSE customCursor;
请注意，游标
应该位于存储过程
中。以下是游标的格式
我假设您正在使用php格式化开始时间和结束时间，然后插入到数据库表中
$start = date("Y-m-d H:i:s",time());
$query = "select * from table name where cid = $cid and UNIX_TIMESTAMP($start) - UNIX_TIMESTAMP(end_time) <= 1800";
mysqli_query($con,$query);
if ($result=mysqli_query($con,$query))
{
$rowcount=mysqli_num_rows($result);
if($rowcount > 1)
{
$row = mysqli_fetch_array($result, MYSQLI_ASSOC);
query2 = "update tablename set end_time = '$start' where id = '$row['id']'";
query3 = "insert into tablename(cid,date,start_time,end_time) values($cid,$date,$start,$end)";
}else{
//do the insert as such
query2 = "insert into tablename(cid,date,start_time,end_time) values($cid,$date,$start,$end)";
}
mysqli_free_result($result);
}
$start=date（“Y-m-dh:i:s”，time（））；
$query=“select*from table name where cid=$cid和UNIX\u TIMESTAMP（$start）-UNIX\u TIMESTAMP（end\u time）如果要使用UPDATE
查询，只需首先在备份表上测试它。非常感谢您，凯尔！我将测试它并让您知道。where子句中的查询错误“job\u date”列不明确“我相信我会找到答案的。同时，根据你的建议，我正在阅读关于库苏尔的文章。谢谢约翰！脚本比较一行的开始/结束时间。在我的示例数据中，我很难弄清楚如何比较第3行的结束时间和第7行的开始时间。如果3.end和7.start之间的差值小于30分钟（1800），则3.end将使用7.start的值进行更新。正如您在我的示例查询中所看到的，虽然id是主键并且是自动递增的（这证实了@KaeL的假设），但并不是所有的工作条目都是按顺序记录的，这就是为什么我按顾问（cid）对它们进行分组，然后按开始时间对它们进行排序的原因。当创建新条目时，我采用开始时间（插入）并查找与已插入的结束时间的差异。找出与cid（待插入）匹配的每一行的差异。如果发现有30分钟（等于或小于30分钟）的差异，则匹配记录end_time
将用开始时间（待插入）更新。然后插入新条目。这就是你要找的吗？谢谢你的解释，约翰！现在更有意义了！我会试试看，让你知道它是怎么回事。
DECLARE id INT(11);
DECLARE newEndDate DATETIME;
DECLARE noMoreRows BIT(1);
DECLARE customCursor CURSOR FOR
SELECT T1.Id
, CAST(SUBSTRING_INDEX(GROUP_CONCAT(T2.start_date ORDER BY T2.Id ASC), ',', 1) AS DATETIME) AS NewEndDate
FROM table T1
INNER JOIN table T2 ON T2.cid = T1.cid
AND T2.job_date = T1.job_date
AND T2.id > T1.id
AND T2.start_time <= DATE_ADD(T1.end_time, INTERVAL 30 MINUTE)
WHERE T1.job_date = @date
GROUP BY T1.Id
HAVING NewEndDate <> '' OR NewEndDate IS NOT NULL;
DECLARE CONTINUE HANDLER FOR NOT FOUND SET noMoreRows = 1;
OPEN customCursor;
customLoop: LOOP
FETCH customCursor INTO id, newEndDate;
IF noMoreRows THEN
LEAVE customLoop;
END IF;
UPDATE table
SET end_date = newEndDate
WHERE id = id;
END LOOP customLoop;
CLOSE customCursor;
$start = date("Y-m-d H:i:s",time());
$query = "select * from table name where cid = $cid and UNIX_TIMESTAMP($start) - UNIX_TIMESTAMP(end_time) <= 1800";
mysqli_query($con,$query);
if ($result=mysqli_query($con,$query))
{
$rowcount=mysqli_num_rows($result);
if($rowcount > 1)
{
$row = mysqli_fetch_array($result, MYSQLI_ASSOC);
query2 = "update tablename set end_time = '$start' where id = '$row['id']'";
query3 = "insert into tablename(cid,date,start_time,end_time) values($cid,$date,$start,$end)";
}else{
//do the insert as such
query2 = "insert into tablename(cid,date,start_time,end_time) values($cid,$date,$start,$end)";
}
mysqli_free_result($result);
}