[英]PHP and MySQL, Using a foreign key to get data from another table where it originates from
This question involves 3 tables that I have in PHPmyAdmin called: 这个问题涉及到我在PHPmyAdmin中拥有的3个表:
tblShoots
tblMemberOnShoot
tblMember
I need to run a query on a users dashboard which tells them, which photoshoots they have been to.The tblmemberOnShoot
table is shown below, if I was to click on through an entry under fldShootID
(which is a foreign key), it would take me to tblShoots
which holds the shoot details, in there I need to pull out fldShootLocation
. 我需要在用户仪表板上运行查询,告诉他们去过哪些照片tblmemberOnShoot
表如下所示,如果我要单击fldShootID
(这是一个外键)下的条目,则需要我进入保存拍摄细节的tblShoots
,在那里我需要拉出fldShootLocation
。
At the moment my query is shown below which doesn't entirely give the output needed, I need help with the join? 在下面显示我的查询时,它不能完全提供所需的输出,我需要联接方面的帮助吗?
<?php
$query = "SELECT * FROM `tblMembersOnShoot` WHERE `fldMemberID` = 1";
$result = $conn -> query($query);
while($row = $result -> fetch_assoc())
{
echo $row['fldShootID']."<br>";
}
?>
As you said, a JOIN
is the way to go. 如您所说, JOIN
是必经之路。 Here's what I'd suggest: 这是我的建议:
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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