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langs a-z

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Ingy döt Net 2013-04-10 22:43:41 -07:00
parent db842d013d
commit d066446780
11389 changed files with 98361 additions and 1020 deletions
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37
Task/Forward-difference/SQL/forward-difference.sql Normal file
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@ -0,0 +1,37 @@
create table list (n integer, v real);
insert into list values (0, 90);
insert into list values (1, 47);
insert into list values (2, 58);
insert into list values (3, 29);
insert into list values (4, 22);
insert into list values (5, 32);
insert into list values (6, 55);
insert into list values (7, 5);
insert into list values (8, 55);
insert into list values (9, 73);
create view diff1 as select list.n, (select next.v from list as next where next.n = list.n + 1) - list.v as v from list;
create view diff2 as select list.n, (select next.v from diff1 as next where next.n = list.n + 1) - list.v as v from diff1 as list;
select * from diff1;
0|-43.0
1|11.0
2|-29.0
3|-7.0
4|10.0
5|23.0
6|-50.0
7|50.0
8|18.0
9|
select * from diff2;
0|54.0
1|-40.0
2|22.0
3|17.0
4|13.0
5|-73.0
6|100.0
7|-32.0
8|
9|