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CREATE TABLE Z_AXIS (x, y) AS SELECT 1, 10 FROM dual UNION ALL SELECT 2, 5 FROM dual UNION ALL SELECT 3, 8 FROM dual UNION ALL SELECT 4, 20 FROM dual UNION ALL SELECT 5, 30 FROM dual UNION ALL SELECT 6, 15 FROM dual UNION ALL SELECT 7, 20 FROM dual UNION ALL SELECT 8, 2 FROM dual UNION ALL SELECT 9, 14 FROM dual UNION ALL SELECT 10, 6 FROM dual UNION ALL SELECT 11, 50 FROM dual UNION ALL SELECT 12, 20 FROM dual UNION ALL SELECT 13, 30 FROM dual UNION ALL SELECT 14, 60 FROM dual UNION ALL SELECT 15, 25 FROM dual UNION ALL SELECT 16, 15 FROM dual UNION ALL SELECT 17, 0 FROM dual UNION ALL SELECT 18, 4 FROM dual UNION ALL SELECT 19, 2 FROM dual UNION ALL SELECT 20, 8 FROM dual UNION ALL SELECT 21, 10 FROM dual UNION ALL SELECT 22, 15 FROM dual UNION ALL SELECT 23, 12 FROM dual UNION ALL SELECT 24, 40 FROM dual UNION ALL SELECT 25, 20 FROM dual
25 rows affected
SELECT x, y FROM ( SELECT x, y, LAG(y) OVER (ORDER BY x) AS prev_y, LEAD(y) OVER (ORDER BY x) AS next_y FROM z_axis ) WHERE y > prev_y AND y > next_y;
X
Y
5
30
7
20
9
14
11
50
14
60
18
4
22
15
24
40