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120 lines
3.6 KiB
Text
120 lines
3.6 KiB
Text
create table t1 (
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pk int primary key,
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a int,
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b int,
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c char(10),
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d decimal(10, 3),
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e real
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);
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insert into t1 values
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( 1, 0, 1, 'one', 0.1, 0.001),
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( 2, 0, 2, 'two', 0.2, 0.002),
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( 3, 0, 3, 'three', 0.3, 0.003),
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( 4, 1, 2, 'three', 0.4, 0.004),
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( 5, 1, 1, 'two', 0.5, 0.005),
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( 6, 1, 1, 'one', 0.6, 0.006),
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( 7, 2, NULL, 'n_one', 0.5, 0.007),
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( 8, 2, 1, 'n_two', NULL, 0.008),
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( 9, 2, 2, NULL, 0.7, 0.009),
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(10, 2, 0, 'n_four', 0.8, 0.010),
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(11, 2, 10, NULL, 0.9, NULL);
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select pk,
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nth_value(pk, 1) over (order by pk),
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nth_value(pk, 2) over (order by pk),
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nth_value(pk, 0) over (order by pk),
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nth_value(pk, -1) over (order by pk),
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nth_value(pk, -2) over (order by pk)
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from t1
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order by pk asc;
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pk nth_value(pk, 1) over (order by pk) nth_value(pk, 2) over (order by pk) nth_value(pk, 0) over (order by pk) nth_value(pk, -1) over (order by pk) nth_value(pk, -2) over (order by pk)
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1 1 NULL NULL NULL NULL
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2 1 2 NULL NULL NULL
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3 1 2 NULL NULL NULL
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4 1 2 NULL NULL NULL
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5 1 2 NULL NULL NULL
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6 1 2 NULL NULL NULL
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7 1 2 NULL NULL NULL
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8 1 2 NULL NULL NULL
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9 1 2 NULL NULL NULL
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10 1 2 NULL NULL NULL
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11 1 2 NULL NULL NULL
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select pk,
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nth_value(pk, pk) over (order by pk),
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nth_value(pk / 0.1, pk) over (order by pk)
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from t1
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order by pk asc;
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pk nth_value(pk, pk) over (order by pk) nth_value(pk / 0.1, pk) over (order by pk)
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1 1 10.0000
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2 2 20.0000
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3 3 30.0000
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4 4 40.0000
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5 5 50.0000
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6 6 60.0000
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7 7 70.0000
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8 8 80.0000
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9 9 90.0000
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10 10 100.0000
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11 11 110.0000
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select pk,
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a,
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nth_value(pk, pk) over (partition by a order by pk),
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nth_value(pk, a + 1) over (partition by a order by pk)
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from t1
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order by pk asc;
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pk a nth_value(pk, pk) over (partition by a order by pk) nth_value(pk, a + 1) over (partition by a order by pk)
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1 0 1 1
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2 0 2 1
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3 0 3 1
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4 1 NULL NULL
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5 1 NULL 5
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6 1 NULL 5
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7 2 NULL NULL
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8 2 NULL NULL
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9 2 NULL 9
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10 2 NULL 9
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11 2 NULL 9
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select pk,
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a,
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nth_value(pk, 1) over (partition by a order by pk ROWS between 1 preceding and 1 following) as nth
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from t1;
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pk a nth
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1 0 1
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2 0 1
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3 0 2
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4 1 4
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5 1 4
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6 1 5
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7 2 7
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8 2 7
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9 2 8
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10 2 9
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11 2 10
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select pk,
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a,
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nth_value(a, 1) over (order by a RANGE BETWEEN 1 preceding and 1 following) as nth1,
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nth_value(a, 2) over (order by a RANGE BETWEEN 1 preceding and 1 following) as nth2,
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nth_value(a, 3) over (order by a RANGE BETWEEN 1 preceding and 1 following) as nth3,
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nth_value(a, 4) over (order by a RANGE BETWEEN 1 preceding and 1 following) as nth4,
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nth_value(a, 5) over (order by a RANGE BETWEEN 1 preceding and 1 following) as nth5,
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nth_value(a, 6) over (order by a RANGE BETWEEN 1 preceding and 1 following) as nth6,
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nth_value(a, 7) over (order by a RANGE BETWEEN 1 preceding and 1 following) as nth7,
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nth_value(a, 8) over (order by a RANGE BETWEEN 1 preceding and 1 following) as nth8,
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nth_value(a, 9) over (order by a RANGE BETWEEN 1 preceding and 1 following) as nth9,
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nth_value(a, 10) over (order by a RANGE BETWEEN 1 preceding and 1 following) as nth10,
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nth_value(a, 11) over (order by a RANGE BETWEEN 1 preceding and 1 following) as nth11,
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nth_value(a, 12) over (order by a RANGE BETWEEN 1 preceding and 1 following) as nth12
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from t1
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order by pk asc;
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pk a nth1 nth2 nth3 nth4 nth5 nth6 nth7 nth8 nth9 nth10 nth11 nth12
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1 0 0 0 0 1 1 1 NULL NULL NULL NULL NULL NULL
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2 0 0 0 0 1 1 1 NULL NULL NULL NULL NULL NULL
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3 0 0 0 0 1 1 1 NULL NULL NULL NULL NULL NULL
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4 1 0 0 0 1 1 1 2 2 2 2 2 NULL
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5 1 0 0 0 1 1 1 2 2 2 2 2 NULL
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6 1 0 0 0 1 1 1 2 2 2 2 2 NULL
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7 2 1 1 1 2 2 2 2 2 NULL NULL NULL NULL
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8 2 1 1 1 2 2 2 2 2 NULL NULL NULL NULL
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9 2 1 1 1 2 2 2 2 2 NULL NULL NULL NULL
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10 2 1 1 1 2 2 2 2 2 NULL NULL NULL NULL
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11 2 1 1 1 2 2 2 2 2 NULL NULL NULL NULL
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drop table t1;
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