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헤르메스 LIFE
[Oracle] LAG, LEAD - 이전, 이후 비교함수, 합계
출처 : http://wintness.tistory.com/76 WITH TESTTABLE AS( SELECT 0 CAT FROM DUAL UNION ALL SELECT 1 CAT FROM DUAL UNION ALL SELECT 3 CAT FROM DUAL UNION ALL SELECT 6 CAT FROM DUAL UNION ALL SELECT 10 CAT FROM DUAL)SELECT CAT, NVL(LAG(CAT, 1) OVER (ORDER BY CAT), 0) PREV_VALUE, NVL(LEAD(CAT, 1) OVER (ORDER BY CAT), 0) NEXT_VALUE, CAT - LAG(CAT, 1) OVER (ORDER BY CAT) GAP_BY_PREV_VALUE, CAT - LEAD(CA..
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2015. 10. 2. 10:26