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CREATE TABLE items (
id int,
name varchar(64)
);
INSERT INTO items VALUES (1, 'Cube'), (2, 'Pyramide');
CREATE TABLE values_color (
item_id int,
value varchar(64)
);
INSERT INTO values_color VALUES (1, 'Red'), (1, 'Yellow'), (2, 'Green'), (2, 'Blue');
CREATE TABLE values_base_color (
item_id int,
value varchar(64)
);
INSERT INTO values_base_color VALUES (1, 'Black'), (2, 'Gray'), (2, 'Brown');
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<?php
use Carbon\Carbon;
$now = Carbon::now()->format('d/m/Y');
printf("Today is %s\nCurrent PHP version: %s \n\n", $now, phpversion());
$query = "
SELECT
items.*,
GROUP_CONCAT(DISTINCT values_color.value) colors,
GROUP_CONCAT(DISTINCT values_base_color.value) base_colors
FROM items
LEFT JOIN values_color ON values_color.item_id = items.id
LEFT JOIN values_base_color ON values_base_color.item_id = items.id
GROUP BY items.id, items.name
;";
// get DB version using PDO
$stmt = $pdo->prepare($query);
$stmt->execute();
$items = $stmt->fetchAll(PDO::FETCH_ASSOC);
print_r($items);
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RDBMS versions: MySQL 8.0, MySQL 8.0 Sakila (ReadOnly), MySQL 9.3.0, MariaDB 11.4, MariaDB 11.8, MariaDB 11.8 OpenFlights (ReadOnly), MariaDB 10, MariaDB 10 Sakila (ReadOnly), SQLite 3, SQLite 3 Preloaded, PostgreSQL 10 Bookings (ReadOnly), PostgreSQL 13, PostgreSQL 14, PostgreSQL 15, PostgreSQL 16, PostgreSQL 17 + PostGIS, PostgreSQL 17 + PostGIS WorkShop (ReadOnly), MS SQL Server 2017, MS SQL Server 2019, MS SQL Server 2022, MS SQL Server 2022 AdventureWorks (ReadOnly), Firebird 4.0, Firebird 4.0 (Employee), Firebird 5.0, RedDatabase 5.0, Oracle Database 19c (HR), Oracle Database 21c, Oracle Database 23c Free, SOQOL, ClickHouse