SQLize Online / PHPize Online  /  SQLtest Online

A A A
Share      Blog   Popular
Copy Format Clear
create table tbl ( id serial, user_login text, device text, issued_at timestamp ); insert into tbl (user_login, device, issued_at) values ('ivanov', 'dev1', '2023-01-01'), ('ivanov', 'dev2', '2023-02-01'), ('petrov', 'dev3', '2023-03-01'), ('petrov', 'dev1', '2023-01-01'), ('sidorov', 'dev4', '2023-02-01'); with d as ( select *, row_number() over (partition by user_login order by issued_at) rn from tbl ) select * from d where rn = 1;
Stuck with a problem? Got Error? Ask ChatGPT!
Copy Clear
Like the site? Share it!
Have a questions? Ask in our telegram chat!
© 2024 SQLize - format run and share SQL queries online | About project | Disclaimer
PHP versions: PHP 5.6, PHP 7.4, PHP 8.0, PHP 8.1, PHP 8.2.13
RDBMS versions: MySQL 5.7, MySQL 5.7 Sakila (ReadOnly), MySQL 8.0, MySQL 8.0 Sakila (ReadOnly), MariaDB 10, MariaDB 10 Sakila (ReadOnly), SQLite 3, PostgreSQL 10 Bookings (ReadOnly), PostgreSQL 11, PostgreSQL 12, PostgreSQL 13, PostgreSQL 14, PostgreSQL 15, MS SQL Server 2017, MS SQL Server 2019, MS SQL Server 2022, Firebird 4.0, Firebird 4.0 (Employee), Oracle Database 19c (HR), Oracle Database 21c, Oracle Database 23c Free, SOQOL