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Added missing files and removed unnessesary ones

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StNicolay
2023-07-16 16:44:42 +03:00
parent c3fa5367c3
commit 199dd693e4
41 changed files with 1442 additions and 50 deletions
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47
SQL/task2.sql Normal file
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DROP TABLE IF EXISTS Salary CASCADE;
CREATE TABLE Salary(
id INT PRIMARY KEY,
salary INT
);
DROP TABLE IF EXISTS Positions CASCADE;
CREATE TABLE Positions(
id INT PRIMARY KEY,
title VARCHAR(255)
);
DROP TABLE IF EXISTS People;
CREATE TABLE People(
id INT PRIMARY KEY,
name VARCHAR(255),
position_id INT REFERENCES Positions(id),
salary_id INT REFERENCES Salary(id)
);
INSERT INTO Salary VALUES (1, 10000), (2, 20000), (3, 3000);
INSERT INTO Positions VALUES (1, 'Дизайнер'), (2, 'Редактор'), (3, 'Программист');
INSERT INTO PEOPLE VALUES (1, 'Владмир', 1, 1), (2, 'Татьяна', 2, 2), (3, 'Александр', NULL, 2), (4, 'Борис', 2, NULL);
SELECT People.id, People.name, Positions.id as pos_id, Positions.title FROM People JOIN Positions on People.position_id = Positions.id;
SELECT People.id, People.name, Positions.id as pos_id, Positions.title FROM People RIGHT JOIN Positions on People.position_id = Positions.id;
SELECT People.id, People.name, Positions.id as pos_id, Positions.title FROM People LEFT JOIN Positions on People.position_id = Positions.id
EXCEPT
SELECT People.id, People.name, Positions.id as pos_id, Positions.title FROM People JOIN Positions on People.position_id = Positions.id;
SELECT People.id, People.name, Positions.id as pos_id, Positions.title FROM People LEFT JOIN Positions on People.position_id = Positions.id
WHERE People.position_id ISNULL;
SELECT People.id, People.name, Positions.id as pos_id, Positions.title FROM People FULL JOIN Positions on People.position_id = Positions.id
WHERE Positions.id ISNULL OR People.id ISNULL;
SELECT People.id, People.name, Positions.id as pos_id, Positions.title FROM People LEFT JOIN Positions on People.position_id = Positions.id
UNION
SELECT People.id, People.name, Positions.id as pos_id, Positions.title FROM People RIGHT JOIN Positions on People.position_id = Positions.id
EXCEPT
SELECT People.id, People.name, Positions.id as pos_id, Positions.title FROM People JOIN Positions on People.position_id = Positions.id;
SELECT People.id, name, position_id, title, salary_id, salary FROM People
JOIN Positions on People.position_id = Positions.id
JOIN Salary ON People.salary_id = Salary.id;