我有两个数据库：
Reservation
------------------------------------------------
| ID | RoomID | RoomName | BookingDate |
|-----------------------------------------------
| 1 | 77 | Gold | 2017-12-05 00:00:00 |
| 2 | 88 | Crystal | 2017-12-11 00:00:00 |
| 3 | 88 | Crystal | 2017-12-20 00:00:00 |
| 4 | 99 | Diamond | 2017-12-01 00:00:00 |
| 5 | 77 | Gold | 2017-12-04 00:00:00 |
| 6 | 77 | Gold | 2017-12-15 00:00:00 |
-------------------------------------------------
Room
-----------------
| ID | RoomName |
-----------------
| 77 | Gold |
| 88 | Crystal |
| 99 | Diamond |
-----------------
我试着在日期范围内计算房间的记录数。输出结果假设为：
------------------------------------------------------ | Date | Gold | Crystal | Diamond | ------------------------------------------------------ | 1.12.2017 - 3.12.2017 | 0 | 0 | 1 | | 4.12.2017 - 10.12.2017 | 2 | 0 | 0 | | 11.12.2017 - 17.12.2017 | 1 | 1 | 0 | | 18.12.2017 - 24.12.2017 | 0 | 1 | 0 | | 25.12.2017 - 31.12.2017 | 0 | 0 | 0 | ------------------------------------------------------
我的编码如下：
<table>
<tr><th> Date </th>
<?php
$sql = mysql_query("SELECT * FROM Room", $con);
while($record = mysql_fetch_array($sql)) {
?>
<td> <?php echo $record['RoomName']?> </td>
<?php
}
?>
</tr>
<tr> <td>
<?php
$week = date("W", strtotime($_GET['Year'] . "-" . $_GET['Month'] ."-01")); // weeknumber of first day of month
$startRange = date("d.m.Y", strtotime($_GET['Year'] . "-" . $_GET['Month'] ."-01")); // first day of month
echo $startRange . " to ";
$unix = strtotime($_GET['Year']."W".$week ."+1 week");
while(date("m", $unix) == $_GET['Month']){ // keep looping/output of while it's correct month
$endRange = date("d.m.Y", $unix-86400);
echo $endRange . "</td>"; // Sunday of previous week
//counting for Gold Room
$res=mysql_query("SELECT * FROM Reservation WHERE (BookingDate>='".$startRange."' AND BookingDate<='".$endRange."') AND RoomID='77' ");
$count=mysql_num_rows($res);
echo "<td align='center'>" . $count . "</td>";
//end counting part
//counting part Crystal Room
$res=mysql_query("SELECT * FROM Reservation WHERE (BookingDate>='".$startRange."' AND BookingDate<='".$endRange."') AND RoomID='88' ");
$count=mysql_num_rows($res);
echo "<td align='center'>" . $count . "</td>";
//end counting part
//counting part Diamond Room
$res=mysql_query("SELECT * FROM Reservation WHERE (BookingDate>='".$startRange."' AND BookingDate<='".$endRange."') AND RoomID='99' ");
$count=mysql_num_rows($res);
echo "<td align='center'>" . $count . "</td>";
//end counting part
echo "</tr><tr> <td align='center'>";
$lastStartRange = date("d.m.Y", $unix);
echo $lastStartRange ." to "; // this week's monday
$unix = $unix + (86400*7);
}
$lastEndRange = date("t.m.Y", strtotime($_GET['Year'] . "-" . $_GET['Month']));
echo $lastEndRange; //echo last day of month
?>
</td> <td align="center">
<?php
//counting for Gold Room
$res=mysql_query("SELECT * FROM Reservation WHERE (BookingDate>='".$lastStartRange."' AND BookingDate<='".$lastEndRange."') AND RoomID='77' ");
$count=mysql_num_rows($res);
echo "<td align='center'>" . $count . "</td>";
//end counting part
//counting part Crystal Room
$res=mysql_query("SELECT * FROM Reservation WHERE (BookingDate>='".$lastStartRange."' AND BookingDate<='".$lastEndRange."') AND RoomID='88' ");
$count=mysql_num_rows($res);
echo "<td align='center'>" . $count . "</td>";
//end counting part
//counting part Diamond Room
$res=mysql_query("SELECT * FROM Reservation WHERE (BookingDate>='".$lastStartRange."' AND BookingDate<='".$lastEndRange."') AND RoomID='99' ");
$count=mysql_num_rows($res);
echo "<td align='center'>" . $count . "</td>";
//end counting part
?>
上述代码的问题在于，当我选择month = January时，它会显示日期范围01.01.2017 - 31.12.2017。
至于记录计数，它与Reservation的数据库表中的记录不匹配。我不知道如何简化代码。我的问题的任何建议或解决方案？
$_GET['Month']和$_GET['Year']检索日期范围的月份和年份。日期范围应根据选定的月份和年份动态变化.. 谢谢..
答案 0 :(得分：0)
好吧，您可以尝试构建以下查询
SELECT '1.12.2017 - 3.12.2017',
sum(CASE WHEN room_id = 77 THEN 1 ELSE 0 END) AS Gold,
sum(CASE WHEN room_id = 88 THEN 1 ELSE 0 END) AS Crystal,
sum(CASE WHEN room_id = 99 THEN 1 ELSE 0 END) AS Dimond,
FROM Reservations
WHERE BookingDate BETWEEN '2017-12-01 00:00:00' AND '2017-12-03 23:59:59'
UNION
SELECT '4.12.2017 - 10.12.2017',
sum(CASE WHEN room_id = 77 THEN 1 ELSE 0 END) AS Gold,
sum(CASE WHEN room_id = 88 THEN 1 ELSE 0 END) AS Crystal,
sum(CASE WHEN room_id = 99 THEN 1 ELSE 0 END) AS Dimond,
FROM Reservations
WHERE BookingDate BETWEEN '2017-12-04 00:00:00' AND '2017-12-10 23:59:59'
UNION
SELECT '11.12.2017 - 17.12.2017',
sum(CASE WHEN room_id = 77 THEN 1 ELSE 0 END) AS Gold,
sum(CASE WHEN room_id = 88 THEN 1 ELSE 0 END) AS Crystal,
sum(CASE WHEN room_id = 99 THEN 1 ELSE 0 END) AS Dimond,
FROM Reservations
WHERE BookingDate BETWEEN '2017-12-11 00:00:00' AND '2017-12-17 23:59:59'
UNION
SELECT '18.12.2017 - 24.12.2017',
sum(CASE WHEN room_id = 77 THEN 1 ELSE 0 END) AS Gold,
sum(CASE WHEN room_id = 88 THEN 1 ELSE 0 END) AS Crystal,
sum(CASE WHEN room_id = 99 THEN 1 ELSE 0 END) AS Dimond,
FROM Reservations
WHERE BookingDate BETWEEN '2017-12-18 00:00:00' AND '2017-12-24 23:59:59'
UNION
SELECT '25.12.2017 - 31.12.2017 ',
sum(CASE WHEN room_id = 77 THEN 1 ELSE 0 END) AS Gold,
sum(CASE WHEN room_id = 88 THEN 1 ELSE 0 END) AS Crystal,
sum(CASE WHEN room_id = 99 THEN 1 ELSE 0 END) AS Dimond,
FROM Reservations
WHERE BookingDate BETWEEN '2017-12-25 00:00:00' AND '2017-12-31 23:59:59'
您需要的是使用所需的输出参数来构建此类查询。这样您就可以一次性获得输出。现在只发布这里似乎是RoomID和RoomName看起来不动态。但同样，您需要动态地在查询中构建它。因此，如果明天会增加另一个房间，它也会显示在查询中。
答案 1 :(得分：0)
我建议有一个日历表（至少是date和weekno），所以假设每个日期表存在一行：
select
c.weekno, room.id, min(c.dt) startweek_dt, max(c.dt) endweek_dt, count(r.bookingdate)
from calendar_table c
cross join room
left join reservation r on c.caldate = r.bookingdate and room.id = r.room_id
where c.dt >= '2017-01-01' and c.dt < '2017-02-01'
group by week(c.weekno), room.id
答案 2 :(得分：0)
您可以使用存储过程而不是查询来动态绑定日期。
CREATE PROCEDURE `Reservation_data` (p_date1 date,p_date2 date)
BEGIN
SELECT concat(date_format(p_date1,'%d.%m.%Y'),' - ',date_format(p_date2,'%d.%m.%Y')),
sum(CASE WHEN room_id = 77 THEN 1 ELSE 0 END) AS Gold,
sum(CASE WHEN room_id = 88 THEN 1 ELSE 0 END) AS Crystal,
sum(CASE WHEN room_id = 99 THEN 1 ELSE 0 END) AS Dimond
FROM Reservations
WHERE BookingDate BETWEEN p_date1 AND p_date2
UNION
SELECT concat(date_format(p_date1,'%d.%m.%Y'),' - ',date_format(p_date2,'%d.%m.%Y')),
sum(CASE WHEN room_id = 77 THEN 1 ELSE 0 END) AS Gold,
sum(CASE WHEN room_id = 88 THEN 1 ELSE 0 END) AS Crystal,
sum(CASE WHEN room_id = 99 THEN 1 ELSE 0 END) AS Dimond
FROM Reservations
WHERE BookingDate BETWEEN p_date1 AND p_date2
UNION
SELECT concat(date_format(p_date1,'%d.%m.%Y'),' - ',date_format(p_date2,'%d.%m.%Y')),
sum(CASE WHEN room_id = 77 THEN 1 ELSE 0 END) AS Gold,
sum(CASE WHEN room_id = 88 THEN 1 ELSE 0 END) AS Crystal,
sum(CASE WHEN room_id = 99 THEN 1 ELSE 0 END) AS Dimond
FROM Reservations
WHERE BookingDate BETWEEN p_date1 AND p_date2
UNION
SELECT concat(date_format(p_date1,'%d.%m.%Y'),' - ',date_format(p_date2,'%d.%m.%Y')),
sum(CASE WHEN room_id = 77 THEN 1 ELSE 0 END) AS Gold,
sum(CASE WHEN room_id = 88 THEN 1 ELSE 0 END) AS Crystal,
sum(CASE WHEN room_id = 99 THEN 1 ELSE 0 END) AS Dimond
FROM Reservations
WHERE BookingDate BETWEEN p_date1 AND p_date2
UNION
SELECT concat(date_format(p_date1,'%d.%m.%Y'),' - ',date_format(p_date2,'%d.%m.%Y')),
sum(CASE WHEN room_id = 77 THEN 1 ELSE 0 END) AS Gold,
sum(CASE WHEN room_id = 88 THEN 1 ELSE 0 END) AS Crystal,
sum(CASE WHEN room_id = 99 THEN 1 ELSE 0 END) AS Dimond
FROM Reservations
WHERE BookingDate BETWEEN p_date1 AND p_date2;
END$$
答案 3 :(得分：0)
如果您对选择Jan时显示全年的原因感到担忧，可能是因为您选择使用周数来获取日期范围。
一年中第一天的周数是52而不是1.这可能会导致问题。有很多方法可以获得特定的日期范围。您可以尝试其他方式来完成这项工作。
答案 4 :(得分：0)
没关系，伙计们。我已经得到了解决方案。谢谢大家的努力。
这是我的回答
<table>
<thead>
<td colspan="12"> <label>Month: </label>
<select name="chooseMonth" onChange="location='?Month=' + this.value">
<option value="1" <?php if($_GET['Month'] == '1') { echo "selected"; } ?>>January</option>
<option value="2" <?php if($_GET['Month'] == '2') { echo "selected"; } ?>>February</option>
<option value="3" <?php if($_GET['Month'] == '3') { echo "selected"; } ?>>March</option>
<option value="4" <?php if($_GET['Month'] == '4') { echo "selected"; } ?>>April</option>
<option value="5" <?php if($_GET['Month'] == '5') { echo "selected"; } ?>>May</option>
<option value="6" <?php if($_GET['Month'] == '6') { echo "selected"; } ?>>June</option>
<option value="7" <?php if($_GET['Month'] == '7') { echo "selected"; } ?>>July</option>
<option value="8" <?php if($_GET['Month'] == '8') { echo "selected"; } ?>>August</option>
<option value="9" <?php if($_GET['Month'] == '9') { echo "selected"; } ?>>September</option>
<option value="10" <?php if($_GET['Month'] == '10') { echo "selected"; } ?>>October</option>
<option value="11" <?php if($_GET['Month'] == '11') { echo "selected"; } ?>>November</option>
<option value="12" <?php if($_GET['Month'] == '12') { echo "selected"; } ?>>December</option>
</select>
<label>Year: </label>
<select name="chooseYear" onChange="location='?Month=<?php echo $_GET['Month']?>&Year=' + this.value">
<option value="2013" <?php if($_GET['Year'] == '2013') { echo "selected"; } ?>>2013</option>
<option value="2014" <?php if($_GET['Year'] == '2014') { echo "selected"; } ?>>2014</option>
<option value="2015" <?php if($_GET['Year'] == '2015') { echo "selected"; } ?>>2015</option>
<option value="2016" <?php if($_GET['Year'] == '2016') { echo "selected"; } ?>>2016</option>
<option value="2017" <?php if($_GET['Year'] == '2017') { echo "selected"; } ?>>2017</option>
<option value="2017" <?php if($_GET['Year'] == '2018') { echo "selected"; } ?>>2018</option>
<option value="2017" <?php if($_GET['Year'] == '2019') { echo "selected"; } ?>>2019</option>
</select>
</td>
</thead>
<tr style="background-color: #ddd;">
<th> Date </th>
<?php
$sql = mysql_query("SELECT * FROM Rooms WHERE Status='T'", $mrrs);
while ($rec = mysql_fetch_array($sql)) {
$RoomName = $rec['Room_Name'];
?>
<td align="center"> <?php echo $RoomName; ?> </td>
<?php } ?>
</tr>
<tr>
<td align="center">
<?php
$endDate = date("t", strtotime($_GET['Year']."-".$_GET['Month']."-01"));
$dayOfWeekOfFirstOfMonth = date("w", strtotime($_GET['Year']."-".$_GET['Month']."-01"));
$lastDayOfFirstWeek = 8 - $dayOfWeekOfFirstOfMonth;
$weeksArray = array(array("firstDay"=>1, "lastDay"=>$lastDayOfFirstWeek));
$loopDate = $lastDayOfFirstWeek + 1;
while($loopDate < $endDate)
{
$weeksArray[] = array("firstDay"=>$loopDate, "lastDay"=>($loopDate+6 > $endDate ? $endDate : $loopDate+6));
$loopDate+=7;
}
foreach($weeksArray as $week)
{
$dayStart = date("d.m.Y", strtotime($_GET['Year']."-".$_GET['Month']."-".$week["firstDay"]));
$dayEnd = date("d.m.Y", strtotime($_GET['Year']."-".$_GET['Month']."-".$week["lastDay"]));
echo $dayStart . "<br> to </br> " . $dayEnd . "</td>";
//Rooms
$sql2 = mysql_query("SELECT * FROM Rooms WHERE Status='T'", $mrrs);
while ($rec2 = mysql_fetch_array($sql2)) {
$RoomID = $rec2['Id'];
$RoomName = $rec2['Room_Name'];
$num=0;
echo "<td align='center'>";
//counting start
$sql3 = mysql_query("SELECT * FROM Reservation WHERE (RoomID='".$RoomID."') AND (StartDate BETWEEN '".date("Y-m-d H:i:s", strtotime($dayStart))."' AND '".date("Y-m-d H:i:s", strtotime($dayEnd))."')",$mrrs);
while ($rec3 = mysql_fetch_array($sql3)) {
$num++;
} echo $num;
//counting end
echo "</td>";
} //Rooms
echo "</tr><tr><td align='center'>";
}
?>
</td>
</tr>
</table>
这是输出： Link to the output image
