[英]PHP and MySQL, Using a foreign key to get data from another table where it originates from
這個問題涉及到我在PHPmyAdmin中擁有的3個表:
tblShoots
tblMemberOnShoot
tblMember
我需要在用戶儀表板上運行查詢,告訴他們去過哪些照片tblmemberOnShoot
表如下所示,如果我要單擊fldShootID
(這是一個外鍵)下的條目,則需要我進入保存拍攝細節的tblShoots
,在那里我需要拉出fldShootLocation
。
在下面顯示我的查詢時,它不能完全提供所需的輸出,我需要聯接方面的幫助嗎?
<?php
$query = "SELECT * FROM `tblMembersOnShoot` WHERE `fldMemberID` = 1";
$result = $conn -> query($query);
while($row = $result -> fetch_assoc())
{
echo $row['fldShootID']."<br>";
}
?>
如您所說, JOIN
是必經之路。 這是我的建議:
SELECT fldShootLocation FROM tblMember
LEFT JOIN tblMembersOnShoot
ON tblMembersOnShoot.fldMemberID = tblMember.fldMemberID
LEFT JOIN tblShoots
ON tblShoots.fldShootID = tblMembersOnShoot.fldShootID
WHERE tblMember.fldMemberID = 1
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