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create table t1 (
pk int primary key,
a int,
b int,
c real
);
insert into t1 values
(101 , 0, 10, 1.1),
(102 , 0, 10, 2.1),
(103 , 1, 10, 3.1),
(104 , 1, 10, 4.1),
(108 , 2, 10, 5.1),
(105 , 2, 20, 6.1),
(106 , 2, 20, 7.1),
(107 , 2, 20, 8.15),
(109 , 4, 20, 9.15),
(110 , 4, 20, 10.15),
(111 , 5, NULL, 11.15),
(112 , 5, 1, 12.25),
(113 , 5, NULL, 13.35),
(114 , 5, NULL, 14.50),
(115 , 5, NULL, 15.65),
(116 , 6, 1, NULL),
(117 , 6, 1, 10),
(118 , 6, 1, 1.1),
(119 , 6, 1, NULL),
(120 , 6, 1, NULL),
(121 , 6, 1, NULL),
(122 , 6, 1, 2.2),
(123 , 6, 1, 20.1),
(124 , 6, 1, -10.4),
(125 , 6, 1, NULL),
(126 , 6, 1, NULL),
(127 , 6, 1, NULL);
--sorted_result
select pk, a, b, avg(b) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING)
from t1;
--sorted_result
select pk, a, c, avg(c) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING)
from t1;
drop table t1;
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