SQL 从第一个 table 中拆分逗号分隔列表,并根据此列表打印第二个 table 中的内容
SQL Split comma separated list from one table and print content from second table based upon this list
我有两个 table,rooms
和 utilities
。
在名为 rooms
的 table 中,我有一个也称为 utilities
的列。此列存储引用 table utilities
.
中 ID 的逗号分隔数字
如何拆分(分解?)utilities
列中的值,并将它们与 utilities
table 中的值进行匹配,将具有匹配 ID 的值打印为 spitted值?
示例:
Table:房间数
|----------------|----------------|---------------- -|
| ID | 姓名 | 实用工具 |
|----------------|----------------|---------------- -|
| 1 |房间 1 | 1,3,4 |
|----------------|----------------|---------------- -|
Table:公用事业
|----------------|----------------|
| ID | 设备 |
|----------------|----------------|
| 1 |演讲者 |
|----------------|----------------|
| 2 |电视 |
|----------------|----------------|
| 3 |智能电视 |
|----------------|----------------|
| 4 |网络摄像头|
|----------------|----------------|
我想打印这样的东西:
Room1: Speakers, Smart TV, Web camera
这是我目前所拥有的,confroomreport.php:
<?php
require_once("db.php");
$util = $conn->getDeviceList();
$arr = $conn->getConfRoomList();
?>
<table border='1'>
<tr>
<th>Room</th>
<th>Utilities</th>
</tr>
<?php for( $i=0; $i < count($arr); $i++) {
print_r ("<tr>
<td>".$arr[$i]['name']."</td>
<td>".$arr[$i]['utilities']."</td>
</tr>"); } ?>
</table>
并在 db.php
public function getDeviceList()
{
$arr = array();
$statement = $this->conn->prepare("SELECT id, device from utilities order by device ASC");
$statement->bind_result($id, $device);
$statement->execute();
while ($statement->fetch()) {
$arr[] = [ "id" => $id, "device" => $device];
}
$statement->close();
return $arr;
}
public function getConfRoomList()
{
$arr = array();
$statement = $this->conn->prepare("SELECT id, name, utilities from rooms order by name ASC");
$statement->bind_result($id, $name, $utilities);
$statement->execute();
while ($statement->fetch()) {
$arr[] = [ "id" => $id, "name" => $name, "utilities" => $utilities];
}
$statement->close();
return $arr;
}
根据已接受的解决方案编辑更新代码:
我把这个添加到我的 db.php:
public function joinDevRoom()
{
$arr = array();
$statement = $this->conn->prepare("SELECT r.name,GROUP_CONCAT(u.device) FROM room r LEFT JOIN utilities u ON FIND_IN_SET(u.id,r.utilities)>0 GROUP BY r.id");
$statement->bind_result($id, $utilities);
$statement->execute();
while ($statement->fetch()) {
$arr[] = [ "id" => $id, "utilities" => $utilities];
}
$statement->close();
return $arr;
}
这是我更新的 confroomreport.php:
<?php
require_once("db.php");
$arr = $conn->getConfRoomList();
$join = $conn->joinDevRoom();
?>
<table border='1'>
<tr>
<th>Room</th>
<th>Utilities</th>
</tr>
<?php for( $i=0; $i < count($arr); $i++) {
print_r ("<tr>
<td>".$arr[$i]['name']."</td>"); }
for( $u=0; $u < count($join); $u++) {
print_r ("<td>".$join[$u]['utilities']."</td>
</tr>"); } ?>
</table>
试试这个
SELECT r.Name,GROUP_CONCAT(u.Device) FROM rooms r
LEFT JOIN utilities u ON FIND_IN_SET(u.id,r.Utilities)>0
GROUP BY r.ID
我有两个 table,rooms
和 utilities
。
在名为 rooms
的 table 中,我有一个也称为 utilities
的列。此列存储引用 table utilities
.
如何拆分(分解?)utilities
列中的值,并将它们与 utilities
table 中的值进行匹配,将具有匹配 ID 的值打印为 spitted值?
示例:
Table:房间数
|----------------|----------------|---------------- -|
| ID | 姓名 | 实用工具 |
|----------------|----------------|---------------- -|
| 1 |房间 1 | 1,3,4 |
|----------------|----------------|---------------- -|
Table:公用事业
|----------------|----------------|
| ID | 设备 |
|----------------|----------------|
| 1 |演讲者 |
|----------------|----------------|
| 2 |电视 |
|----------------|----------------|
| 3 |智能电视 |
|----------------|----------------|
| 4 |网络摄像头|
|----------------|----------------|
我想打印这样的东西:
Room1: Speakers, Smart TV, Web camera
这是我目前所拥有的,confroomreport.php:
<?php
require_once("db.php");
$util = $conn->getDeviceList();
$arr = $conn->getConfRoomList();
?>
<table border='1'>
<tr>
<th>Room</th>
<th>Utilities</th>
</tr>
<?php for( $i=0; $i < count($arr); $i++) {
print_r ("<tr>
<td>".$arr[$i]['name']."</td>
<td>".$arr[$i]['utilities']."</td>
</tr>"); } ?>
</table>
并在 db.php
public function getDeviceList()
{
$arr = array();
$statement = $this->conn->prepare("SELECT id, device from utilities order by device ASC");
$statement->bind_result($id, $device);
$statement->execute();
while ($statement->fetch()) {
$arr[] = [ "id" => $id, "device" => $device];
}
$statement->close();
return $arr;
}
public function getConfRoomList()
{
$arr = array();
$statement = $this->conn->prepare("SELECT id, name, utilities from rooms order by name ASC");
$statement->bind_result($id, $name, $utilities);
$statement->execute();
while ($statement->fetch()) {
$arr[] = [ "id" => $id, "name" => $name, "utilities" => $utilities];
}
$statement->close();
return $arr;
}
根据已接受的解决方案编辑更新代码:
我把这个添加到我的 db.php:
public function joinDevRoom()
{
$arr = array();
$statement = $this->conn->prepare("SELECT r.name,GROUP_CONCAT(u.device) FROM room r LEFT JOIN utilities u ON FIND_IN_SET(u.id,r.utilities)>0 GROUP BY r.id");
$statement->bind_result($id, $utilities);
$statement->execute();
while ($statement->fetch()) {
$arr[] = [ "id" => $id, "utilities" => $utilities];
}
$statement->close();
return $arr;
}
这是我更新的 confroomreport.php:
<?php
require_once("db.php");
$arr = $conn->getConfRoomList();
$join = $conn->joinDevRoom();
?>
<table border='1'>
<tr>
<th>Room</th>
<th>Utilities</th>
</tr>
<?php for( $i=0; $i < count($arr); $i++) {
print_r ("<tr>
<td>".$arr[$i]['name']."</td>"); }
for( $u=0; $u < count($join); $u++) {
print_r ("<td>".$join[$u]['utilities']."</td>
</tr>"); } ?>
</table>
试试这个
SELECT r.Name,GROUP_CONCAT(u.Device) FROM rooms r
LEFT JOIN utilities u ON FIND_IN_SET(u.id,r.Utilities)>0
GROUP BY r.ID