CREATE TABLE project(
    id serial PRIMARY KEY,
    nama VARCHAR (191),
    tanggal date,
    biaya int
)

CREATE TABLE category(
    id serial PRIMARY KEY,
    nama VARCHAR (191),
)

CREATE TABLE pivot_category(
    id serial PRIMARY KEY,
    category_id INT,
    CONSTRAINT fk_category
        FOREIGN KEY(category_id) REFERENCES category(id),
    project_id INT,
    CONSTRAINT fk_project
        FOREIGN KEY(project_id) REFERENCES project(id)
)