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Developer-C 11.1
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WITH orclass AS ( SELECT '12:00' AS Thetime, 1 AS L1R, 2 AS L2R, 1 AS L3R UNION ALL SELECT '12:00', 1, 2, 0 UNION ALL SELECT '13:00', 1, 1, 1 UNION ALL SELECT '13:00', 2, 0, 8 UNION ALL SELECT '14:00', 2, 4, 9 UNION ALL SELECT '14:00', 0, 3, 6 ) SELECT s1.Thetime, s1.L1R, s1.L2R, s1.L3R FROM orclass s1 WHERE NOT EXISTS (SELECT 1 FROM orclass s2 WHERE s1.Thetime = s2.Thetime AND s2.L3R = 0);
Thetime
L1R
L2R
L3R
13:00
1
1
1
13:00
2
0
8
14:00
2
4
9
14:00
0
3
6