CREATE TABLE aktien (
    id INT NOT NULL AUTO_INCREMENT,
    user_id INT NOT NULL,
    WKNISIN VARCHAR(20) NOT NULL,
    Symbol VARCHAR(20) NULL,
    Aktie VARCHAR(100) NOT NULL,
    kaufdatum DATE NOT NULL,
    kaufpreis DECIMAL(10, 2) NOT NULL,
    anzahl DECIMAL(10, 4) NOT NULL,
    kursdatum DATE NULL,
    kurs DECIMAL(10, 2) NULL,
    PRIMARY KEY (id)
);