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SQLize.online is a free online SQL environment for quickly running, experimenting with and sharing code.
You can run your SQL code on top of the most popular RDBMS including MySQL, MariaDB, SQLite, PostgreSQL, Oracle and Microsoft SQL Server.
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CREATE TABLE contacts ( uid varchar(100), email varchar(100), ts bigint ); INSERT INTO contacts (email,uid,ts) VALUES ('aaa@aaa.com','a',unix_timestamp()); INSERT INTO contacts (email,uid,ts) VALUES ('bbb@aaa.com','b',unix_timestamp()); INSERT INTO contacts (email,uid,ts) VALUES ('cc@aaa.com','c',unix_timestamp()); INSERT INTO contacts (email,uid,ts) VALUES ('bbb@aaa.com','b',unix_timestamp()); INSERT INTO contacts (email,uid,ts) VALUES ('aaa@aaa.com','a',unix_timestamp()); INSERT INTO contacts (email,uid,ts) VALUES ('aaa@aaa.com','a',unix_timestamp()); INSERT INTO contacts (email,uid,ts) VALUES ('ccc@aaa.com','c',unix_timestamp()); INSERT INTO contacts (email,uid,ts) VALUES ('aaa@aaa.com','a',unix_timestamp()); INSERT INTO contacts (email,uid,ts) VALUES ('bbb@aaa.com','b',unix_timestamp()); INSERT INTO contacts (email,uid,ts) VALUES ('ccc@aaa.com','c',unix_timestamp()); INSERT INTO contacts (email,uid,ts) VALUES ('ddd@aaa.com','d',unix_timestamp()); delete a from contacts a left join( select max(ts) maxtimestamp, email, uid from contacts group by uid, email) b on a.ts = maxtimestamp and a.uid = b.uid and a.email = b.email where b.maxtimestamp IS NULL; SELECT * FROM contacts;
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MariaDB 11.4
MariaDB 11.5
MariaDB 10
MariaDB 10 Sakila (ReadOnly)
MySQL 5.7
MySQL 5.7 Sakila (ReadOnly)
MySQL 8.0
MySQL 8.0 Sakila (ReadOnly)
SQLite 3
PostgreSQL 10 Bookings (ReadOnly)
PostgreSQL 11
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PostgreSQL 13
PostgreSQL 14
PostgreSQL 15
MS SQL Server 2017
MS SQL Server 2019
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MS SQL Server 2022 AdventureWorks (ReadOnly)
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Oracle Database 19c (HR)
Oracle Database 21c
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