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working randomization

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This commit is contained in:
Maciekxdabu 2022-12-15 09:56:59 +01:00
parent ba73e56213
commit 143f2ac566
1 changed files with 13 additions and 2 deletions
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15
SQL stuff/generate_lab-4.sql
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@ -7,7 +7,9 @@ truncate table manager cascade;--
truncate table club cascade;-- truncate table club cascade;--
truncate table competition cascade;--competition is last since it has no foreign keys (but club holds a foreign key to competition) truncate table competition cascade;--competition is last since it has no foreign keys (but club holds a foreign key to competition)
declare loops number := 10; declare loops number := 50;
begin
declare many_to_many number := 15;
begin begin
--create table countryTable (Cname varchar(20)) --create table countryTable (Cname varchar(20))
@ -113,7 +115,7 @@ insert into takes_part_in
SELECT club.id as club_id, match.id as match_id SELECT club.id as club_id, match.id as match_id
FROM club, match FROM club, match
ORDER BY DBMS_RANDOM.RANDOM) ORDER BY DBMS_RANDOM.RANDOM)
WHERE rownum < 11; WHERE rownum <= many_to_many;
--insert into takes_part_in --insert into takes_part_in
-- select -- select
@ -126,6 +128,14 @@ insert into takes_part_in
--insert into takes_place_in --insert into takes_place_in
-- select stadium.id, competition.id from stadium, competition ORDER BY DBMS_RANDOM.RANDOM limit 10; -- select stadium.id, competition.id from stadium, competition ORDER BY DBMS_RANDOM.RANDOM limit 10;
insert into takes_place_in
SELECT stadium_id, competition_id
FROM (
SELECT stadium.id as stadium_id, competition.id as competition_id
FROM stadium, competition
ORDER BY DBMS_RANDOM.RANDOM)
WHERE rownum <= many_to_many;
--insert into takes_place_in --insert into takes_place_in
-- select -- select
-- dbms_random.value(1,loops) as stadium_id, -- dbms_random.value(1,loops) as stadium_id,
@ -134,4 +144,5 @@ insert into takes_part_in
--connect by level <=loops --connect by level <=loops
--; --;
end;
end; end;