mirror of
https://github.com/ada-dmitry/DB.mephi_ada.git
synced 2026-09-24 08:00:16 +00:00
reboot rep
This commit is contained in:
ada-dmitry
@@ -0,0 +1,450 @@
|
||||
/* Вариант 1 || Работа 6 || Антипенко, Дробышевский */
|
||||
|
||||
|
||||
-- Task 1 --
|
||||
/* a) Напишите запрос, используя конструкцию WITH, выбирающий
|
||||
рекурсивно сотрудника с идентификатором 1 и все его подчинённых,
|
||||
как прямых, так и подчинённых более низкого ранга*.
|
||||
b) Напишите программу на языке PL/SQL, печатающую на экран фамилию
|
||||
и имя сотрудника с идентификатором 1 и всех его подчинённых, как
|
||||
прямых, так и подчинённых более низкого ранга. */
|
||||
|
||||
-- Пункт а)
|
||||
WITH RECURSIVE tmp AS (
|
||||
|
||||
SELECT id, first_name, last_name, manager_id, 1 AS level
|
||||
FROM bd6_employees
|
||||
WHERE id = 1
|
||||
UNION all
|
||||
SELECT e.id, e.first_name, e.last_name, e.manager_id, t.level + 1
|
||||
FROM bd6_employees e
|
||||
JOIN tmp t ON e.manager_id = t.id
|
||||
)
|
||||
SELECT *
|
||||
FROM tmp
|
||||
;
|
||||
|
||||
-- Пункт б)
|
||||
CREATE OR REPLACE PROCEDURE depa(integer) AS $$
|
||||
DECLARE
|
||||
d_attrs RECORD;
|
||||
i integer;
|
||||
l integer;
|
||||
BEGIN
|
||||
FOR d_attrs IN
|
||||
(
|
||||
SELECT id,last_name, first_name, manager_id
|
||||
FROM bd6_employees
|
||||
ORDER BY manager_id
|
||||
)
|
||||
LOOP
|
||||
IF d_attrs.manager_id=$1 THEN
|
||||
RAISE INFO ' % % % % ', d_attrs.first_name, d_attrs.last_name, d_attrs.id, d_attrs.manager_id;
|
||||
l:= d_attrs.id;
|
||||
CALL depa(l);
|
||||
END IF;
|
||||
END LOOP;
|
||||
END $$ LANGUAGE plpgsql;
|
||||
|
||||
CREATE OR REPLACE PROCEDURE dep(integer) AS $$
|
||||
DECLARE
|
||||
d_attrs RECORD;
|
||||
BEGIN
|
||||
FOR d_attrs IN
|
||||
(
|
||||
SELECT
|
||||
id,
|
||||
last_name,
|
||||
first_name,
|
||||
manager_id
|
||||
FROM bd6_employees
|
||||
ORDER BY manager_id
|
||||
)
|
||||
|
||||
LOOP
|
||||
IF d_attrs.id=$1 THEN
|
||||
RAISE INFO ' % % % % ', d_attrs.first_name, d_attrs.last_name, d_attrs.id, d_attrs.manager_id;
|
||||
END IF;
|
||||
END LOOP;
|
||||
CALL depa($1);
|
||||
END $$ LANGUAGE plpgsql;
|
||||
CALL dep(1);
|
||||
|
||||
-- Task 2 --
|
||||
/* Напишите программу на языке PL/SQL, выбирающую строки из таблицы
|
||||
employees в порядке возрастания заработной платы (salary) и печатающие на
|
||||
экран следующие данные: фамилия, имя, модифицированная заработная
|
||||
плата. Модифицированная заработная плата получается следующим
|
||||
образом: у первого по порядку сотрудника она округляется до сотен в
|
||||
меньшую сторону, а у всех последующих сотрудников она сначала
|
||||
увеличивается на остаток от округления, полученный от предыдущего
|
||||
сотрудника, а затем округляется до сотен в меньшую сторону. */
|
||||
|
||||
UPDATE bd6_employees SET salary_in_euro = 299 WHERE id = 3;
|
||||
|
||||
CREATE OR REPLACE PROCEDURE print_employees() AS $$
|
||||
DECLARE
|
||||
current_salary INTEGER;
|
||||
m_salary INTEGER;
|
||||
mod_salary INTEGER := 0;
|
||||
employee_rec RECORD;
|
||||
BEGIN
|
||||
FOR employee_rec IN
|
||||
(
|
||||
SELECT last_name, first_name, salary_in_euro
|
||||
FROM bd6_employees
|
||||
ORDER BY salary_in_euro
|
||||
)
|
||||
|
||||
LOOP
|
||||
current_salary := employee_rec.salary_in_euro;
|
||||
|
||||
m_salary := ((current_salary + mod_salary) / 100) * 100;
|
||||
|
||||
RAISE NOTICE 'Employee: % % || Modified Salary: %', employee_rec.last_name, employee_rec.first_name, m_salary;
|
||||
mod_salary := mod(current_salary + mod_salary,100);
|
||||
END LOOP;
|
||||
END $$ LANGUAGE plpgsql;
|
||||
|
||||
CALL print_employees();
|
||||
SELECT *
|
||||
FROM bd6_employees
|
||||
ORDER BY salary_in_euro;
|
||||
|
||||
|
||||
-- Task 3 --
|
||||
/* Напишите программу на языке PL/SQL, удаляющую 10 сотрудников с
|
||||
самой маленькой заработной платой. При этом их заработная плата должна
|
||||
добавиться 10 сотрудникам с самой большой заработной платой. Причём
|
||||
самая маленькая заработная плата должна добавиться к человеку с самой
|
||||
большой заработной платой. 2-я с конца заработная плата должна добавиться
|
||||
к человеку со второй по размеру заработной платой и т.д. */
|
||||
|
||||
CREATE OR REPLACE FUNCTION rearrange_salaries() RETURNS VOID AS $$
|
||||
DECLARE
|
||||
salaries RECORD;
|
||||
small NUMERIC[];
|
||||
larg NUMERIC[];
|
||||
const CONSTANT INTEGER = 3;
|
||||
BEGIN
|
||||
FOR salaries IN
|
||||
SELECT id, salary_in_euro
|
||||
FROM bd6_employees
|
||||
ORDER BY salary_in_euro
|
||||
LIMIT const
|
||||
LOOP
|
||||
small = array_append(small, (SELECT salary_in_euro FROM bd6_employees WHERE id = salaries.id));
|
||||
DELETE FROM bd6_employees
|
||||
WHERE id = salaries.id;
|
||||
END LOOP;
|
||||
|
||||
FOR salaries IN
|
||||
SELECT id, salary_in_euro
|
||||
FROM bd6_employees
|
||||
ORDER BY salary_in_euro DESC
|
||||
LIMIT const
|
||||
LOOP
|
||||
larg = array_append(larg, (SELECT id FROM bd6_employees WHERE id = salaries.id));
|
||||
END LOOP;
|
||||
|
||||
FOR i IN 1..const
|
||||
LOOP
|
||||
UPDATE bd6_employees
|
||||
SET salary_in_euro = salary_in_euro + small[i]
|
||||
WHERE id = larg[i];
|
||||
END LOOP;
|
||||
END;
|
||||
$$ LANGUAGE plpgsql;
|
||||
SELECT rearrange_salaries();
|
||||
|
||||
-- Task 4 --
|
||||
/* Создайте таблицу spiral с 5 полями f1, f2, f3, f4, f5 – целые числа.
|
||||
Напишите программу на языке PL/SQL, заполняющую данную таблицу 1000
|
||||
строк по следующему принципу:
|
||||
1 2 3 4 5
|
||||
10 9 8 7 6
|
||||
11 12 13 14 15
|
||||
20 19 18 17 16
|
||||
21 22 23 24 25 */
|
||||
|
||||
CREATE OR REPLACE PROCEDURE f() AS $$
|
||||
DECLARE d_attrs RECORD;
|
||||
BEGIN
|
||||
|
||||
FOR d_attrs IN WITH RECURSIVE tmp AS (
|
||||
SELECT 1+i*5 AS f1, 2+i*5 AS f2, 3+i*5 AS f3, 4+i*5 AS f4,5+i*5 AS f5
|
||||
FROM generate_series(0,199) i)
|
||||
|
||||
SELECT * FROM tmp
|
||||
LOOP
|
||||
case
|
||||
when ( mod(d_attrs.f1,2)!=0)
|
||||
then RAISE INFO ' % % % % %', d_attrs.f1, d_attrs.f2, d_attrs.f3, d_attrs.f4, d_attrs.f5;
|
||||
when ( mod(d_attrs.f1,2)=0)
|
||||
then RAISE INFO ' % % % % %', d_attrs.f5, d_attrs.f4, d_attrs.f3, d_attrs.f2, d_attrs.f1;
|
||||
end case;
|
||||
END LOOP;
|
||||
END $$ LANGUAGE plpgsql;
|
||||
call f();
|
||||
|
||||
-- Task 7 from lab4 --
|
||||
|
||||
|
||||
CREATE table staff(
|
||||
id integer primary key,
|
||||
name varchar(64) NOT NULL,
|
||||
department varchar(64) NOT NULL
|
||||
);
|
||||
|
||||
CREATE SEQUENCE staff_id_seq
|
||||
START WITH 12
|
||||
CYCLE
|
||||
INCREMENT BY 8
|
||||
CACHE 100;
|
||||
|
||||
|
||||
INSERT INTO staff VALUES
|
||||
(nextval('staff_id_seq'), 'Ivan Makarenko', 'Director');
|
||||
|
||||
INSERT INTO staff
|
||||
(SELECT nextval('staff_id_seq'), last_name, department_name
|
||||
FROM employees e JOIN departments d ON e.department_id = d.department_id);
|
||||
|
||||
UPDATE staff SET department = 'Innovations department'
|
||||
WHERE id < 40;
|
||||
|
||||
DELETE FROM staff
|
||||
WHERE name ILIKE('%K%');
|
||||
|
||||
CREATE VIEW dep_staff_counts AS
|
||||
SELECT department, COUNT(*) AS ecount
|
||||
FROM staff
|
||||
GROUP BY department;
|
||||
|
||||
SELECT * FROM dep_staff_counts;
|
||||
|
||||
|
||||
|
||||
|
||||
|
||||
-- CREATE OR REPLACE PROCEDURE department_names(integer) AS $$
|
||||
-- DECLARE
|
||||
-- d_attrs RECORD;
|
||||
-- i INTEGER;
|
||||
-- l INTEGER;
|
||||
-- BEGIN
|
||||
-- FOR d_attrs IN
|
||||
-- (
|
||||
-- SELECT id,last_name, first_name, manager_id
|
||||
-- FROM bd6_employees order by manager_id
|
||||
-- )
|
||||
-- LOOP
|
||||
-- IF d_attrs.manager_id=$1 THEN
|
||||
-- RAISE INFO ' % % % % ', d_attrs.first_name, d_attrs.last_name, d_attrs.id, d_attrs.manager_id;
|
||||
-- l:= d_attrs.id;
|
||||
-- CALL department_names(l);
|
||||
-- END IF;
|
||||
-- END LOOP;
|
||||
-- END $$ LANGUAGE plpgsql;
|
||||
|
||||
|
||||
-- CREATE OR REPLACE PROCEDURE department_names2(integer) AS $$
|
||||
-- DECLARE d_attrs RECORD;
|
||||
-- BEGIN
|
||||
-- FOR d_attrs IN
|
||||
-- (
|
||||
-- SELECT id,last_name, first_name, manager_id
|
||||
-- FROM bd6_employees
|
||||
-- order by manager_id
|
||||
-- )
|
||||
|
||||
-- LOOP
|
||||
-- if d_attrs.id=$1 then
|
||||
-- RAISE INFO ' % % % % ', d_attrs.first_name, d_attrs.last_name, d_attrs.id, d_attrs.manager_id;
|
||||
-- end if;
|
||||
-- END LOOP;
|
||||
-- CALL department_names($1);
|
||||
-- END $$ LANGUAGE plpgsql;
|
||||
-- CALL department_names2(4);
|
||||
|
||||
|
||||
/* Вариант 1 || Работа 6 || Антипенко, Дробышевский */
|
||||
|
||||
|
||||
-- Task 1 --
|
||||
-- Пункт а)
|
||||
WITH RECURSIVE tmp AS (
|
||||
|
||||
SELECT id, first_name, last_name, manager_id, 1 AS level
|
||||
FROM bd6_employees
|
||||
WHERE id = 1
|
||||
UNION all
|
||||
SELECT e.id, e.first_name, e.last_name, e.manager_id, t.level + 1
|
||||
FROM bd6_employees e
|
||||
JOIN tmp t ON e.manager_id = t.id
|
||||
)
|
||||
SELECT *
|
||||
FROM tmp
|
||||
;
|
||||
|
||||
-- Пункт б)
|
||||
CREATE OR REPLACE PROCEDURE depa(integer) AS $$
|
||||
DECLARE
|
||||
d_attrs RECORD;
|
||||
i integer;
|
||||
l integer;
|
||||
BEGIN
|
||||
FOR d_attrs IN
|
||||
(
|
||||
SELECT id,last_name, first_name, manager_id
|
||||
FROM bd6_employees
|
||||
ORDER BY manager_id
|
||||
)
|
||||
LOOP
|
||||
IF d_attrs.manager_id=$1 THEN
|
||||
RAISE INFO ' % % % % ', d_attrs.first_name, d_attrs.last_name, d_attrs.id, d_attrs.manager_id;
|
||||
l:= d_attrs.id;
|
||||
CALL depa(l);
|
||||
END IF;
|
||||
END LOOP;
|
||||
END $$ LANGUAGE plpgsql;
|
||||
|
||||
CREATE OR REPLACE PROCEDURE dep(integer) AS $$
|
||||
DECLARE
|
||||
d_attrs RECORD;
|
||||
BEGIN
|
||||
FOR d_attrs IN
|
||||
(
|
||||
SELECT
|
||||
id,
|
||||
last_name,
|
||||
first_name,
|
||||
manager_id
|
||||
FROM bd6_employees
|
||||
ORDER BY manager_id
|
||||
)
|
||||
|
||||
LOOP
|
||||
IF d_attrs.id=$1 THEN
|
||||
RAISE INFO ' % % % % ', d_attrs.first_name, d_attrs.last_name, d_attrs.id, d_attrs.manager_id;
|
||||
END IF;
|
||||
END LOOP;
|
||||
CALL depa($1);
|
||||
END $$ LANGUAGE plpgsql;
|
||||
CALL dep(1);
|
||||
|
||||
-- Task 2 --
|
||||
|
||||
UPDATE bd6_employees SET salary_in_euro = 299 WHERE id = 3;
|
||||
|
||||
CREATE OR REPLACE PROCEDURE print_employees() AS $$
|
||||
DECLARE
|
||||
current_salary INTEGER;
|
||||
m_salary INTEGER;
|
||||
mod_salary INTEGER := 0;
|
||||
employee_rec RECORD;
|
||||
i INTEGER = 0;
|
||||
cnt INTEGER;
|
||||
BEGIN
|
||||
SELECT COUNT(*) INTO cnt FROM bd6_employees;
|
||||
FOR employee_rec IN
|
||||
(
|
||||
SELECT last_name, first_name, salary_in_euro
|
||||
FROM bd6_employees
|
||||
ORDER BY salary_in_euro
|
||||
)
|
||||
LOOP
|
||||
|
||||
current_salary := employee_rec.salary_in_euro;
|
||||
|
||||
IF cnt - 1 = i THEN
|
||||
m_salary := ((current_salary) / 100) * 100 + mod_salary;
|
||||
ELSE
|
||||
m_salary := ((current_salary) / 100) * 100;
|
||||
END IF;
|
||||
|
||||
RAISE NOTICE 'Employee: % % || Modified Salary: %', employee_rec.last_name, employee_rec.first_name, m_salary;
|
||||
|
||||
mod_salary := mod_salary + mod(current_salary, 100);
|
||||
i := i+1;
|
||||
|
||||
END LOOP;
|
||||
|
||||
END $$ LANGUAGE plpgsql;
|
||||
|
||||
CALL print_employees();
|
||||
SELECT *
|
||||
FROM bd6_employees
|
||||
ORDER BY salary_in_euro;
|
||||
|
||||
|
||||
-- Task 3 --
|
||||
CREATE OR REPLACE FUNCTION rearrange_salaries() RETURNS VOID AS $$
|
||||
DECLARE
|
||||
salaries RECORD;
|
||||
small NUMERIC[];
|
||||
larg NUMERIC[];
|
||||
const CONSTANT INTEGER = 10;
|
||||
BEGIN
|
||||
FOR salaries IN
|
||||
SELECT id, salary_in_euro
|
||||
FROM bd6_employees
|
||||
ORDER BY salary_in_euro
|
||||
LIMIT const
|
||||
LOOP
|
||||
small = array_append(small, (SELECT salary_in_euro FROM bd6_employees WHERE id = salaries.id));
|
||||
UPDATE bd6_employees SET manager_id = NULL WHERE manager_id = salaries.id;
|
||||
DELETE FROM bd6_employees
|
||||
WHERE id = salaries.id;
|
||||
END LOOP;
|
||||
|
||||
FOR salaries IN
|
||||
SELECT id, salary_in_euro
|
||||
FROM bd6_employees
|
||||
ORDER BY salary_in_euro DESC
|
||||
LIMIT const
|
||||
LOOP
|
||||
larg = array_append(larg, (SELECT id FROM bd6_employees WHERE id = salaries.id));
|
||||
END LOOP;
|
||||
|
||||
FOR i IN 1..const
|
||||
LOOP
|
||||
UPDATE bd6_employees
|
||||
SET salary_in_euro = salary_in_euro + small[i]
|
||||
WHERE id = larg[i];
|
||||
END LOOP;
|
||||
END;
|
||||
$$ LANGUAGE plpgsql;
|
||||
SELECT rearrange_salaries();
|
||||
|
||||
-- Task 4 --
|
||||
|
||||
CREATE OR REPLACE PROCEDURE f() AS $$
|
||||
DECLARE d_attrs RECORD;
|
||||
BEGIN
|
||||
|
||||
FOR d_attrs IN WITH RECURSIVE tmp AS (
|
||||
SELECT 1+i*5 AS f1, 2+i*5 AS f2, 3+i*5 AS f3, 4+i*5 AS f4,5+i*5 AS f5
|
||||
FROM generate_series(0,199) i)
|
||||
|
||||
SELECT * FROM tmp
|
||||
LOOP
|
||||
case
|
||||
when ( mod(d_attrs.f1,2)!=0)
|
||||
then RAISE INFO ' % % % % %', d_attrs.f1, d_attrs.f2, d_attrs.f3, d_attrs.f4, d_attrs.f5;
|
||||
when ( mod(d_attrs.f1,2)=0)
|
||||
then RAISE INFO ' % % % % %', d_attrs.f5, d_attrs.f4, d_attrs.f3, d_attrs.f2, d_attrs.f1;
|
||||
end case;
|
||||
END LOOP;
|
||||
END $$ LANGUAGE plpgsql;
|
||||
call f();
|
||||
|
||||
-- Task 7 from lab4 --
|
||||
DROP VIEW IF EXISTS dep_staff_counts;
|
||||
|
||||
CREATE VIEW dep_staff_counts AS
|
||||
SELECT department, COUNT(*) AS ecount
|
||||
FROM staff
|
||||
GROUP BY department;
|
||||
|
||||
SELECT * FROM dep_staff_counts;
|
||||
Reference in New Issue
Block a user