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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);
select pk, a, b, avg(b) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING)
from t1;
pk a b avg(b) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING)
101 0 10 10.0000
102 0 10 10.0000
103 1 10 10.0000
104 1 10 10.0000
105 2 20 20.0000
106 2 20 20.0000
107 2 20 16.6667
108 2 10 15.0000
109 4 20 20.0000
110 4 20 20.0000
111 5 NULL 1.0000
112 5 1 1.0000
113 5 NULL 1.0000
114 5 NULL NULL
115 5 NULL NULL
116 6 1 1.0000
117 6 1 1.0000
118 6 1 1.0000
119 6 1 1.0000
120 6 1 1.0000
121 6 1 1.0000
122 6 1 1.0000
123 6 1 1.0000
124 6 1 1.0000
125 6 1 1.0000
126 6 1 1.0000
127 6 1 1.0000
select pk, a, c, avg(c) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING)
from t1;
pk a c avg(c) over (partition by a order by pk ROWS BETWEEN 1 PRECEDING AND 1 FOLLOWING)
101 0 1.1 1.6
102 0 2.1 1.6
103 1 3.1 3.5999999999999996
104 1 4.1 3.5999999999999996
105 2 6.1 6.6
106 2 7.1 7.116666666666667
107 2 8.15 6.783333333333334
108 2 5.1 6.625000000000001
109 4 9.15 9.65
110 4 10.15 9.65
111 5 11.15 11.7
112 5 12.25 12.25
113 5 13.35 13.366666666666667
114 5 14.5 14.5
115 5 15.65 15.075
116 6 NULL 10
117 6 10 5.55
118 6 1.1 5.55
119 6 NULL 1.0999999999999996
120 6 NULL NULL
121 6 NULL 2.1999999999999997
122 6 2.2 11.15
123 6 20.1 3.966666666666667
124 6 -10.4 4.85
125 6 NULL -10.400000000000002
126 6 NULL NULL
127 6 NULL NULL
drop table t1;
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