mirror of
https://github.com/MariaDB/server.git
synced 2025-11-03 20:36:16 +01:00
120 lines
3.6 KiB
Text
120 lines
3.6 KiB
Text
create table t1 (
|
|
pk int primary key,
|
|
a int,
|
|
b int,
|
|
c char(10),
|
|
d decimal(10, 3),
|
|
e real
|
|
);
|
|
insert into t1 values
|
|
( 1, 0, 1, 'one', 0.1, 0.001),
|
|
( 2, 0, 2, 'two', 0.2, 0.002),
|
|
( 3, 0, 3, 'three', 0.3, 0.003),
|
|
( 4, 1, 2, 'three', 0.4, 0.004),
|
|
( 5, 1, 1, 'two', 0.5, 0.005),
|
|
( 6, 1, 1, 'one', 0.6, 0.006),
|
|
( 7, 2, NULL, 'n_one', 0.5, 0.007),
|
|
( 8, 2, 1, 'n_two', NULL, 0.008),
|
|
( 9, 2, 2, NULL, 0.7, 0.009),
|
|
(10, 2, 0, 'n_four', 0.8, 0.010),
|
|
(11, 2, 10, NULL, 0.9, NULL);
|
|
select 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)
|
|
from t1
|
|
order by pk asc;
|
|
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)
|
|
1 1 NULL NULL NULL NULL
|
|
2 1 2 NULL NULL NULL
|
|
3 1 2 NULL NULL NULL
|
|
4 1 2 NULL NULL NULL
|
|
5 1 2 NULL NULL NULL
|
|
6 1 2 NULL NULL NULL
|
|
7 1 2 NULL NULL NULL
|
|
8 1 2 NULL NULL NULL
|
|
9 1 2 NULL NULL NULL
|
|
10 1 2 NULL NULL NULL
|
|
11 1 2 NULL NULL NULL
|
|
select pk,
|
|
nth_value(pk, pk) over (order by pk),
|
|
nth_value(pk / 0.1, pk) over (order by pk)
|
|
from t1
|
|
order by pk asc;
|
|
pk nth_value(pk, pk) over (order by pk) nth_value(pk / 0.1, pk) over (order by pk)
|
|
1 1 10.0000
|
|
2 2 20.0000
|
|
3 3 30.0000
|
|
4 4 40.0000
|
|
5 5 50.0000
|
|
6 6 60.0000
|
|
7 7 70.0000
|
|
8 8 80.0000
|
|
9 9 90.0000
|
|
10 10 100.0000
|
|
11 11 110.0000
|
|
select 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)
|
|
from t1
|
|
order by pk asc;
|
|
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)
|
|
1 0 1 1
|
|
2 0 2 1
|
|
3 0 3 1
|
|
4 1 NULL NULL
|
|
5 1 NULL 5
|
|
6 1 NULL 5
|
|
7 2 NULL NULL
|
|
8 2 NULL NULL
|
|
9 2 NULL 9
|
|
10 2 NULL 9
|
|
11 2 NULL 9
|
|
select pk,
|
|
a,
|
|
nth_value(pk, 1) over (partition by a order by pk ROWS between 1 preceding and 1 following) as nth
|
|
from t1;
|
|
pk a nth
|
|
1 0 1
|
|
2 0 1
|
|
3 0 2
|
|
4 1 4
|
|
5 1 4
|
|
6 1 5
|
|
7 2 7
|
|
8 2 7
|
|
9 2 8
|
|
10 2 9
|
|
11 2 10
|
|
select pk,
|
|
a,
|
|
nth_value(a, 1) over (order by a RANGE BETWEEN 1 preceding and 1 following) as nth1,
|
|
nth_value(a, 2) over (order by a RANGE BETWEEN 1 preceding and 1 following) as nth2,
|
|
nth_value(a, 3) over (order by a RANGE BETWEEN 1 preceding and 1 following) as nth3,
|
|
nth_value(a, 4) over (order by a RANGE BETWEEN 1 preceding and 1 following) as nth4,
|
|
nth_value(a, 5) over (order by a RANGE BETWEEN 1 preceding and 1 following) as nth5,
|
|
nth_value(a, 6) over (order by a RANGE BETWEEN 1 preceding and 1 following) as nth6,
|
|
nth_value(a, 7) over (order by a RANGE BETWEEN 1 preceding and 1 following) as nth7,
|
|
nth_value(a, 8) over (order by a RANGE BETWEEN 1 preceding and 1 following) as nth8,
|
|
nth_value(a, 9) over (order by a RANGE BETWEEN 1 preceding and 1 following) as nth9,
|
|
nth_value(a, 10) over (order by a RANGE BETWEEN 1 preceding and 1 following) as nth10,
|
|
nth_value(a, 11) over (order by a RANGE BETWEEN 1 preceding and 1 following) as nth11,
|
|
nth_value(a, 12) over (order by a RANGE BETWEEN 1 preceding and 1 following) as nth12
|
|
from t1
|
|
order by pk asc;
|
|
pk a nth1 nth2 nth3 nth4 nth5 nth6 nth7 nth8 nth9 nth10 nth11 nth12
|
|
1 0 0 0 0 1 1 1 NULL NULL NULL NULL NULL NULL
|
|
2 0 0 0 0 1 1 1 NULL NULL NULL NULL NULL NULL
|
|
3 0 0 0 0 1 1 1 NULL NULL NULL NULL NULL NULL
|
|
4 1 0 0 0 1 1 1 2 2 2 2 2 NULL
|
|
5 1 0 0 0 1 1 1 2 2 2 2 2 NULL
|
|
6 1 0 0 0 1 1 1 2 2 2 2 2 NULL
|
|
7 2 1 1 1 2 2 2 2 2 NULL NULL NULL NULL
|
|
8 2 1 1 1 2 2 2 2 2 NULL NULL NULL NULL
|
|
9 2 1 1 1 2 2 2 2 2 NULL NULL NULL NULL
|
|
10 2 1 1 1 2 2 2 2 2 NULL NULL NULL NULL
|
|
11 2 1 1 1 2 2 2 2 2 NULL NULL NULL NULL
|
|
drop table t1;
|