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USE Study
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GO
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-- <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD>Լ<EFBFBD>
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-- FISRT_VALUE: ù<EFBFBD><EFBFBD>° Ʃ<EFBFBD>ø<EFBFBD>
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SELECT DISTINCT DNO, FIRST_VALUE(SALARY) OVER (PARTITION BY DNO ORDER BY SALARY DESC) AS HIGH_SALARY
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FROM EMPLOYEE
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-- LAG/LEAD: <EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD>/<EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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SELECT
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DISTINCT ENAME,
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SALARY,
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LAG(SALARY, 1) OVER(ORDER BY SALARY DESC) AS LAG_SALARY,
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LEAD(SALARY, 1) OVER(ORDER BY SALARY DESC) AS LEAD_SALARY
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FROM EMPLOYEE
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