Free Online Firebird 4.0 (Employee) Playground: Practice & Master SQL Skills

SQL code: Upload Copy Format Clear

SELECT emp_no AS EMP_NO, first_name AS FIRST_NAME, last_name AS LAST_NAME, EXTRACT(YEAR FROM sh.change_date) AS CHANGES_YEAR, COUNT(*) AS CHANGES_COUNT FROM employee e JOIN salary_history sh ON e.emp_no = sh.emp_no -- Adjust based on your actual schema GROUP BY emp_no, first_name, last_name, EXTRACT(YEAR FROM sh.change_date) HAVING COUNT(*) > 1 ORDER BY emp_no; ; SELECT 'Last_query_cost' AS "Variable_name", 0 AS "Value" FROM RDB$DATABASE;

SQL Server:

Stuck with a problem? Got Error? Ask AI support!

SQL Result: ( preserve ) Copy Clear

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 14, PostgreSQL 15, PostgreSQL 16, PostgreSQL 17 + PostGIS, PostgreSQL 17 + PostGIS WorkShop (ReadOnly), PostgreSQL 18, MS SQL Server 2017, MS SQL Server 2019, MS SQL Server 2022, MS SQL Server 2022 AdventureWorks (ReadOnly), MS SQL Server 2025, Firebird 4.0, Firebird 4.0 (Employee), Firebird 5.0, RedDatabase 5.0, Oracle Database 19c (HR), Oracle Database 21c, Oracle Database 26ai, SOQOL, ClickHouse

SQLize | PHPize | SQLtest

Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code

Stuck with a problem? Got Error? Ask AI support!

Save Snippet

SQLize | PHPize | SQLtest

Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code

Stuck with a problem? Got Error? Ask AI support!