Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code
A
A
A
create table t (id int, uid int, utm varchar(16));
insert into t values
(1, 10, 'test1'),
(2, 10, 'test2'),
(3, 10, 'test3'),
(4, 11, 'test4'),
(5, 11, 'test5');
-- using window functions
select distinct
uid, first_value(utm) over (partition by uid order by id desc) last_utm
from t;
-- using join
select t.uid, t.utm last_utm
from t
join (
select max(id) max_id from t group by uid
) max_ids on max_id = id;
-- using sub-query
select t.uid, t.utm last_utm
from t
where id = (select max(id) max_id from t group by uid having max(id) = t.id);
Stuck with a problem? Got Error? Ask AI support!
© 2025 Free Online MariaDB 10 Playground: Practice & Master SQL Skills |
About project |
Privacy Policy and Disclaimer
The site powered by:
PHP versions: PHP 7.4, PHP 8.0, PHP 8.1, PHP 8.2, PHP 8.3, PHP 8.4
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
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