如何将多个输入插入按相同数据分组的同一行

Question

I have a system that records all the user's purchases. In my system, I have a table called purchase_item .

The table purchase_item looks like this

id	order_id	product_name
1	10001	iphoneX
2	10001	ipnone 12 Pro
3	10001	ipad
4	10002	Apple pen
5	10002	Airpods
6	10002	Iphone 12 Pro Max

This is my query to insert the data above

$osql = "INSERT INTO `purchase_items`(`order_id`, `product_name`) VALUES ('$order_id',`$product_name` )";

Now i created another table( receipt_table ) that i want to insert the above data in group. Anyone knows how can i do it?

what I want is the output of my table to look like this:

id	order_id
1	10001
2	10002

I want to group my data by using "INSERT INTO". Anyone knows how can i do that?

Answer 1

The way to retrieve the last inserted id in MySQL is $mysqli->insert_id .

$mysqli = new mysqli($servername, $username, $password, $dbname);

$osql = "INSERT INTO `purchase_items`(`order_id`, `product_name`) VALUES (?, ?)";
$stmt = $mysqli->prepare($osql);
$stmt->bind_param("is", $order_id, $product_name);
$stmt->execute();

$id = $mysqli->insert_id;
$rsql = "INSERT INTO receipt_table (order_id) VALUES (?)";
$stmt = $conn->prepare($rsql);
$stmt->bind_param("i", $id);
$stmt->execute();

https://www.php.net/manual/en/mysqli.insert-id.phphttps://www.w3schools.com/php/php_mysql_prepared_statements.asp

Answer 2

Without knowing what sql dialect you use, but in sql server we could do like this:

INSERT INTO receipt_table(id, order_id)
select id, order_id
from purchase_items
group by id, order_id

Answer 3

<?php $purchased_item = [ [10001, "iPhoneX"], [10001, "iPhone 12 Pro"], [10001, "iPad"], [10002, "Apple Pen"], [10002, "Airpods"], [10002, "iPhone 12 Pro Max"] ]; $servername = "localhost"; $username = "root"; //your user name $password = ""; // your password here $dbname = "myDB"; // database name $conn = new mysqli($servername, $username, $password, $dbname); $osql = "INSERT INTO `purchase_items`(`order_id`, `product_name`) VALUES (?,? )"; $ostmt = $conn->prepare($osql); $isql = "INSERT INTO reciept_table(`id`, `order_id`) VALUES (?, ?)"; $istmt = $conn->prepare($isql); $lastId = null; // to check id is entered or not foreach ($purchased_item as $value) { $ostmt->bind_param("is", $value[0], $value[1]); $ostmt->execute(); if ($lastId != $value[0]){ $istmt->bind_param("i", $value[0]); $istmt->execute(); } $lastId = $vlaue[0]; } ?>

Answer 4

you can simple use a sql to insert grouped data.and I guess that receipt_table id is an auto_incremnt id.

insert into 
    receipt_table(order_id)
    select order_id from purchase_items 
    group by order_id;