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

SQL code: Upload Copy Format Clear

select E.EMP_NO, E.FIRST_NAME, E.LAST_NAME, YEAR(SH.CHANGE_DATE) AS CHANGES_YEAR, COUNT(SH.NEW_SALARY) AS CHANGES_COUNT FROM EMPLOYEE E JOIN SALARY_HISTORY SH ON E.EMP_NO=SH.EMP_NO WHERE SH.CHANGE_DATE BETWEEN ( DATE_ADD(SH.CHANGE_DATE, INTERVAL -1 YEAR) AND DATE_ADD(SH.CHANGE_DATE, INTERVAL 1 YEAR) ) AND SH.NEW_SALARY IS NOT NULL GROUP BY E.EMP_NO HAVING COUNT(SH.NEW_SALARY)>1 ORDER BY E.EMP_NO;

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SQL Result: ( preserve ) Copy Clear

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