我有一个包含 3 个表（客户、蜂箱、检查）的数据库，每个检查只能有一个蜂箱和一个客户。一个客户可以有很多蜂箱，一个蜂箱可以有很多检查）
理想情况下，我想做的是查看每个客户的每个蜂箱的最新检查，并计算有多少蜂箱死了，有多少蜂箱还活着（基于检查表中“蜂箱强度”字段的值。
这让我困惑了一段时间，我认为这是因为我的代码很糟糕，而且很可能不是最好的方法。
我想知道是否有人可以帮助我实现下表：
客户名称 | 最近的检查 | 总活荨麻疹 | 总死荨麻疹
这是我的半工作代码（请注意 - 它很丑陋）：
$ContactsQ = mysql_query("
SELECT
*
FROM
Contacts
WHERE
`Contacts`.`Status` = 'Active'
AND
`Contacts`.`Type` = 'Rental'
GROUP BY
ContactID
");
if (!$ContactsQ) {
die('Invalid query: ' . mysql_error());
}
echo "<table class=\"tablesorter\" >";
echo "<thead><tr>";
echo "<th>ID     </th>";
echo "<th> Name</font></th>";
echo "<th>Live Hives</font></th>";
echo "<th>Dead Hives</font></th>";
echo "<th>Last Inspected</font></th>";
echo "<th>AG</font></th>";
echo "</tr></thead>";
// For Each Customer//
while(($CQ = mysql_fetch_assoc($ContactsQ))) {
$live = 0;
$dead = 0;
$CID = $CQ['ContactID'];
$Query = mysql_query("
SELECT
MAX(`InspectionsNZ`.`InsID`) Ins,
Hives.* ,
Contacts.*
FROM
`InspectionsNZ`
LEFT JOIN `Contacts` ON `Contacts`.`ContactID` = `InspectionsNZ`.`CustomerID`
LEFT JOIN `Hives` ON `Hives`.`ID` = `InspectionsNZ`.`HiveID`
WHERE
`Hives`.`Status` = 'Active'
AND Contacts.ContactID = $CID
GROUP BY
`ID`
");
if (!$Query) {
die('Invalid query: ' . mysql_error());
}
// For Each Hive the customer has that is active
while(($row1 = mysql_fetch_assoc($Query))) {
$HID = $row1['ID'];
$lastinsID = $row1['Ins'];
$Query1 = mysql_query("
SELECT
HiveStrength, Date, InsID, CustomerID
FROM
InspectionsNZ
WHERE
`InsID` = $lastinsID
ORDER BY
`InsID`
");
if (!$Query1) {
die('Invalid query: ' . mysql_error());
}
// Add to total if Alive or Dead
while(($row = mysql_fetch_assoc($Query1))) {
//Get current CustomerID//
$nquery = mysql_query("
SELECT
MAX(`InspectionsNZ`.`InsID`) ,
`CustomerID`
from
`InspectionsNZ`
WHERE
`HiveID` = $HID
");
if (!$nquery) {
die('Invalid query: ' . mysql_error());
}
while(($nrow = mysql_fetch_assoc($nquery))) {
$NCID = $nrow['CustomerID'];
}
//END Get current CustomerID//
if ($CID == $NCID){
if($row['HiveStrength'] > 0) {
$live++;
}
elseif($row['HiveStrength'] == 0) {
$dead++;
}
}
echo $HID." - ".$NCID." - ".$row['CustomerID']." - ".$CID." - ".$lastinsID." - ".$row['Date']."<br/>";
}
}
echo "<tr>";
echo "<td><h3>" .$CQ['ContactID']. "</h3></td>";
echo "<td><a href='CustomerTop.php?cid=" .$CQ['ContactID']. "'>" .$CQ['Name']. "</a></td>";
echo "<td><h3>" .$live. "</h3></td>";
echo "<td><h3>" .$dead. "</h3></td>";
echo "<td><h3>" .$CQ['Date']. "</h3></td>";
echo "<td><h3>" .$CQ['RunGroup']. "</h3></td>";
}
echo "</tr>";
echo "</tbody>";
echo "</table><br />";
我得到的是一份客户名单，但对活蜂箱和死蜂箱的计算不正确......
请帮忙 ：）
朱利安