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6lab_DONE!

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ada-dmitry
2023-11-27 23:50:07 +03:00
parent c5039ec7e7
commit d6d403f3d5
5 changed files with 221 additions and 47 deletions
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Lab/Lab#6/insert.sql
+1 -1
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@@ -1,4 +1,4 @@
DROP TABLE bd6_employees IF EXISTS;
DROP TABLE IF EXISTS bd6_employees;
-- CREATE TABLE bd6_departments(
-- id integer PRIMARY KEY,
Lab/Lab#6/lab6.sql
+49
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@@ -0,0 +1,49 @@
CREATE OR REPLACE PROCEDURE update_salary() AS $$
DECLARE
emp_record bd6_employees%ROWTYPE;
counter integer := 0;
min_salary bd6_employees.salary_in_euro%TYPE;
max_salary bd6_employees.salary_in_euro%TYPE;
BEGIN
-- SELECT MIN(salary_in_euro), MAX(salary_in_euro) INTO min_salary, max_salary FROM bd6_employees;
FOR emp_record IN
SELECT * FROM (SELECT * FROM bd6_employees ORDER BY salary_in_euro LIMIT 3) AS min_salaries
LOOP
DELETE FROM bd6_employees WHERE id = emp_record.id;
counter := counter + 1;
END LOOP;
FOR emp_record IN
SELECT * FROM (SELECT * FROM bd6_employees ORDER BY salary_in_euro DESC LIMIT 3) AS max_salaries
LOOP
UPDATE bd6_employees SET salary_in_euro = salary_in_euro + min_salary WHERE id = emp_record.id;
counter := counter + 1;
END LOOP;
RAISE NOTICE 'Successfully updated % bd6_employees.', counter;
END $$ LANGUAGE plpgsql;
CALL update_salary();
CREATE OR REPLACE PROCEDURE update_and_delete_salaries() AS $$
BEGIN
-- Увеличение заработной платы
WITH lowest_salaries AS (
SELECT id, salary_in_euro
FROM bd6_employees
ORDER BY salary_in_euro
LIMIT 10
), highest_salary AS (
SELECT max(salary_in_euro) AS max_salary
FROM bd6_employees
)
UPDATE bd6_employees e
SET salary_in_euro = e.salary_in_euro + ls.salary_in_euro - (SELECT max_salary FROM highest_salary)
FROM lowest_salaries ls
WHERE e.id = ls.id;
-- Удаление сотрудников
DELETE FROM bd6_employees WHERE id IN (SELECT id FROM lowest_salaries);
RAISE NOTICE 'Salaries updated and lowest paid bd6_employees deleted.';
END;
$$ LANGUAGE plpgsql;
Lab/Lab#6/lab6_done.sql
+34 -23
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@@ -50,6 +50,7 @@ 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;
@@ -74,32 +75,42 @@ CALL print_employees();
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 PROCEDURE update_salary() AS $$
CREATE OR REPLACE FUNCTION rearrange_salaries() RETURNS VOID AS $$
DECLARE
emp_record bd6_employees%ROWTYPE;
counter integer := 0;
min_salary bd6_employees.salary_in_euro%TYPE;
max_salary bd6_employees.salary_in_euro%TYPE;
salaries RECORD;
small NUMERIC[];
larg NUMERIC[];
const CONSTANT INTEGER = 10;
BEGIN
SELECT MIN(salary_in_euro), MAX(salary_in_euro) INTO min_salary, max_salary FROM bd6_employees;
FOR emp_record IN
SELECT * FROM (SELECT * FROM bd6_employees ORDER BY salary_in_euro LIMIT 3) AS min_salaries
LOOP
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;
DELETE FROM bd6_employees WHERE id = emp_record.id;
counter := counter + 1;
END LOOP;
FOR emp_record IN
SELECT * FROM (SELECT * FROM bd6_employees ORDER BY salary_in_euro DESC LIMIT 3) AS max_salaries
LOOP
UPDATE bd6_employees SET salary_in_euro = salary_in_euro + min_salary WHERE id = emp_record.id;
counter := counter + 1;
END LOOP;
RAISE NOTICE 'Successfully updated % bd6_employees.', counter;
END $$ LANGUAGE plpgsql;
CALL update_salary();
FOR salaries IN
SELECT id, salary_in_euro
FROM bd6_employees
ORDER BY salary_in_euro DESC
LIMIT const
LOOP
larg = array_append(larg, (SELECT id FROM bd6_employees WHERE id = salaries.id));
END LOOP;
FOR i IN 1..const
LOOP
UPDATE bd6_employees
SET salary_in_euro = salary_in_euro + small[i]
WHERE id = larg[i];
END LOOP;
END;
$$ LANGUAGE plpgsql;
SELECT rearrange_salaries();
-- Task 4 --
/* Создайте таблицу spiral с 5 полями f1, f2, f3, f4, f5 – целые числа.
Lab/Lab#6/test3.sql
+33 -23
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@@ -1,26 +1,36 @@
CREATE OR REPLACE PROCEDURE update_salary() AS $$
CREATE OR REPLACE FUNCTION rearrange_salaries() RETURNS VOID AS $$
DECLARE
emp_record bd6_employees%ROWTYPE;
counter integer := 0;
min_salary bd6_employees.salary_in_euro%TYPE;
max_salary bd6_employees.salary_in_euro%TYPE;
salaries RECORD;
small NUMERIC[];
larg NUMERIC[];
const CONSTANT INTEGER = 10;
BEGIN
SELECT MIN(salary_in_euro), MAX(salary_in_euro) INTO min_salary, max_salary FROM bd6_employees;
FOR emp_record IN
SELECT * FROM (SELECT * FROM bd6_employees ORDER BY salary_in_euro LIMIT 3) AS min_salaries
LOOP
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;
DELETE FROM bd6_employees WHERE id = emp_record.id;
counter := counter + 1;
END LOOP;
FOR emp_record IN
SELECT * FROM (SELECT * FROM bd6_employees ORDER BY salary_in_euro DESC LIMIT 3) AS max_salaries
LOOP
UPDATE bd6_employees SET salary_in_euro = salary_in_euro + min_salary WHERE id = emp_record.id;
counter := counter + 1;
END LOOP;
RAISE NOTICE 'Successfully updated % bd6_employees.', counter;
END $$ LANGUAGE plpgsql;
CALL update_salary();
FOR salaries IN
SELECT id, salary_in_euro
FROM bd6_employees
ORDER BY salary_in_euro DESC
LIMIT const
LOOP
larg = array_append(larg, (SELECT id FROM bd6_employees WHERE id = salaries.id));
END LOOP;
FOR i IN 1..const
LOOP
UPDATE bd6_employees
SET salary_in_euro = salary_in_euro + small[i]
WHERE id = larg[i];
END LOOP;
END;
$$ LANGUAGE plpgsql;
SELECT rearrange_salaries();
Practice/27_11.sql
+104
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@@ -0,0 +1,104 @@
-- Task 1 --
CREATE OR REPLACE PROCEDURE molodec() AS $$
DECLARE
name1 varchar := 'Julia';
name2 varchar := 'Пустотааа';
BEGIN
RAISE INFO ' %, %, вы молодцы! ', name1, name2;
END $$ LANGUAGE plpgsql;
CALL molodec();
-- Task 2 --
CREATE OR REPLACE PROCEDURE fiiiizika() AS $$
DECLARE
velocity_kmh NUMERIC := 60;
time_seconds NUMERIC := 30;
velocity_ms NUMERIC;
distance_m NUMERIC;
train_length_m NUMERIC;
BEGIN
velocity_ms := velocity_kmh * 1000 / 3600;
distance_m := velocity_ms * time_seconds;
train_length_m := distance_m;
RAISE INFO ' % ', TRUNC(train_length_m);
END;
$$ LANGUAGE plpgsql;
CALL fiiiizika();
-- Task 3 --
CREATE OR REPLACE PROCEDURE show_city_streets() AS $$
DECLARE
city_record RECORD;
BEGIN
FOR city_record IN SELECT city, street_address FROM locations
LOOP
RAISE NOTICE 'В городе % есть улица %',
city_record.city, city_record.street_address;
END LOOP;
END;
$$ LANGUAGE plpgsql;
CALL show_city_streets();
-- Task 4 --
CREATE OR REPLACE PROCEDURE factorial(n INTEGER) AS $$
DECLARE
result INTEGER := 1;
i INTEGER := 1;
BEGIN
WHILE i <= n LOOP
result := result * i;
i := i + 1;
END LOOP;
RAISE INFO ' % ', result;
END;
$$ LANGUAGE plpgsql;
CALL factorial(10);
-- Task 5 --
CREATE OR REPLACE FUNCTION get_employees_and_managers_names()
RETURNS TABLE (employee_name TEXT, manager_name TEXT) AS $$
BEGIN
RETURN QUERY
SELECT e.first_name || ' ' || e.last_name AS employee_name,
COALESCE(m.first_name || ' ' || m.last_name, 'No manager') AS manager_name
FROM employees e
LEFT JOIN employees m ON e.manager_id = m.employee_id;
END;
$$ LANGUAGE plpgsql;
SELECT get_employees_and_managers_names();
-- Task 6 --
CREATE OR REPLACE FUNCTION binary_to_decimal(binary_num VARCHAR)
RETURNS NUMERIC AS $$
DECLARE
decimal_num NUMERIC := 0;
power NUMERIC := 0;
bit NUMERIC;
BEGIN
FOR i IN REVERSE 1..LENGTH(binary_num) LOOP
bit := CAST(SUBSTRING(binary_num FROM i FOR 1) AS NUMERIC);
decimal_num := decimal_num + (bit * (2 ^ power));
power := power + 1;
END LOOP;
RETURN decimal_num;
END;
$$ LANGUAGE plpgsql;
SELECT binary_to_decimal('101');