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https://github.com/kuhyx/WUT_Computer_Science.git
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Krzysztof kuhy Rudnicki
635e287095
git-subtree-dir: NotProgramming/EDABA-LAB git-subtree-mainline:b88865222bgit-subtree-split:cc8d63c734
97 lines
3.3 KiB
SQL
97 lines
3.3 KiB
SQL
-- Author: Krzysztof Rudnicki
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-- Student number: 307585
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--=======================insert_trigger=======================
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-- show data
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-- show competition which reputation was affected by attendance of the newly inserted match
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select * from competition where id = 1
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-- show match who is inserted and by that affects competition reputation
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select * from match where id = 1234567
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-- create trigger
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-- set competition reputation equal to max (5) reputation if the match in this competition was attended by at least 10k people, and to 1 otherwise
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CREATE OR REPLACE trigger match_insert_trigger after insert on match
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for each row
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begin
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update competition
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set reputation = 5
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where id = :NEW.competition_id AND :NEW.attendance > 10000;
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update competition
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set reputation = 1
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where id = :NEW.competition_id AND :NEW.attendance < 10000;
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end;
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-- trigger trigger
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-- insert
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-- sufficient (at least 10k attendance) to change competition reputation
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insert into match
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values(1234567, 10, 5, 30000, 'sunny', 90, To_date(TRUNC(DBMS_RANDOM.VALUE(TO_CHAR(DATE '1900-01-01','J') ,TO_CHAR(DATE '2023-12-31','J'))), 'J'), 'referre', 1)
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-- insufficient (less than 10k attendance) to change competition reputation
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insert into match
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values(1234567, 10, 5, 3000, 'sunny', 90, To_date(TRUNC(DBMS_RANDOM.VALUE(TO_CHAR(DATE '1900-01-01','J') ,TO_CHAR(DATE '2023-12-31','J'))), 'J'), 'referre', 1)
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delete from match where id = 1234567
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--=======================update_trigger=======================
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-- Run before/after trigger
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-- show club affected by update trigger when manager reputation influences club reputation
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select * from club where manager_id = 1
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-- show manager which update influences club reputation
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select * from manager where id = 1
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-- Run to create trigger
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-- updates club reputation if the competition the club is taking part in has high enough prize value
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CREATE OR REPLACE trigger update_maanger_trigger after update on manager
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for each row
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begin
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update club
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set reputation = :NEW.reputation
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where id = :NEW.club_id;
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end;
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-- Run to trigger trigger
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-- update
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-- update manager reputation to 1 and trigger update for club to set reputation to 1
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update manager
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set reputation = 1
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where id = 1;
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-- update manager reputation to 5 and trigger update for club to set reputation to 5
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update manager
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set reputation = 5
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where id = 1;
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--=======================delete_trigger=======================
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-- show data
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-- show competition which reputation was affected by attendance of the newly inserted match
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select * from competition where id = 1
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-- show match who is inserted and by that affects competition reputation
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select * from match where id = 1234567
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-- create trigger
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-- set competition reputation equal to min (1) reputation if the match deleted from competition was attended by at least 10k people, and to 5 otherwise
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CREATE OR REPLACE trigger match_delete_trigger after delete on match
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for each row
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begin
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update competition
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set reputation = 1
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where id = :OLD.competition_id AND :OLD.attendance > 10000;
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end;
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-- trigger trigger
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-- insert
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-- sufficient (at least 10k attendance) to change competition reputation
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insert into match
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values(1234567, 10, 5, 30000, 'sunny', 90, To_date(TRUNC(DBMS_RANDOM.VALUE(TO_CHAR(DATE '1900-01-01','J') ,TO_CHAR(DATE '2023-12-31','J'))), 'J'), 'referre', 1)
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delete from match where id = 1234567
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