Error Code: 1062. Duplicate entry 'PRIMARY'

Question

So, my professor gave me tables to insert it in a database but when I execute his code, MySQL is constantly giving the Error Code: 1062. Here is the conflict tables and the inserts:

TABLES

CREATE TABLE FABRICANTES(
COD_FABRICANTE integer NOT NULL,
NOMBRE         VARCHAR(15), 
PAIS           VARCHAR(15),
primary key (cod_fabricante)
);

CREATE TABLE ARTICULOS(
ARTICULO       VARCHAR(20)NOT NULL,
COD_FABRICANTE integer NOT NULL,
PESO           integer NOT NULL ,
CATEGORIA      VARCHAR(10) NOT NULL,
PRECIO_VENTA   integer,
PRECIO_COSTO   integer,
EXISTENCIAS    integer,
primary key (articulo,cod_fabricante),
foreign key (cod_fabricante) references Fabricantes(cod_fabricante)
);

INSERT INTO:

INSERT INTO FABRICANTES VALUES(10,'CALVO', 'ESPAÑA');
INSERT INTO FABRICANTES VALUES(15,'LU', 'BELGICA');
INSERT INTO FABRICANTES VALUES(20,'BARILLA', 'ITALIA');
INSERT INTO FABRICANTES VALUES(25,'GALLO', 'ESPAÑA');
INSERT INTO FABRICANTES VALUES(30,'PRESIDENT', 'FRANCIA');

INSERT INTO ARTICULOS VALUES ('Macarrones',20, 1, 'Primera',100,98,120);
INSERT INTO ARTICULOS VALUES ('Tallarines',20, 2, 'Primera',120,100,100);
INSERT INTO ARTICULOS VALUES ('Tallarines',20, 1, 'Segunda',99,50,100);
INSERT INTO ARTICULOS VALUES ('Macarrones',20, 1, 'Tercera',80,50,100);
INSERT INTO ARTICULOS VALUES ('Atún',10, 3, 'Primera',200,150,220);
INSERT INTO ARTICULOS VALUES ('Atún',10, 3, 'Segunda',150,100,220);
INSERT INTO ARTICULOS VALUES ('Atún',10, 3, 'Tercera',100,50,220);
INSERT INTO ARTICULOS VALUES ('Sardinillas',10, 1,'Primera',250,200,200);
INSERT INTO ARTICULOS VALUES ('Sardinillas',10, 1,'Segunda',200,160,200);
INSERT INTO ARTICULOS VALUES ('Sardinillas',10, 1,'Tercera',100,150,220);
INSERT INTO ARTICULOS VALUES ('Mejillones',10, 1, 'Tercera',90,50,200);
INSERT INTO ARTICULOS VALUES ('Mejillones',10, 1, 'Primera',200,150,300);
INSERT INTO ARTICULOS VALUES ('Macarrones',25, 1, 'Primera',90,68,150);
INSERT INTO ARTICULOS VALUES ('Tallarines',25, 1, 'Primera',100,90,100);
INSERT INTO ARTICULOS VALUES ('Fideos',25, 1, 'Segunda',75,50,100);
INSERT INTO ARTICULOS VALUES ('Fideos',25, 1, 'Primera',100,80,100);
INSERT INTO ARTICULOS VALUES ('Galletas Cuadradas',15, 1, 'Primera',100,80,100);
INSERT INTO ARTICULOS VALUES ('Galletas Cuadradas',15, 1, 'Segunda',70,50,100);
INSERT INTO ARTICULOS VALUES ('Galletas Cuadradas',15, 1, 'Tercera',50,40,100);
INSERT INTO ARTICULOS VALUES ('Barquillos',15, 1, 'Primera',100,80,100);
INSERT INTO ARTICULOS VALUES ('Barquillos',15, 1, 'Segunda',100,80,100);
INSERT INTO ARTICULOS VALUES ('Canutillos',15, 2, 'Primera',170,150,110);
INSERT INTO ARTICULOS VALUES ('Canutillos',15, 2, 'Segunda',120,150,110);
INSERT INTO ARTICULOS VALUES ('Leche entera',30, 1, 'Primera',110,100,300);
INSERT INTO ARTICULOS VALUES ('Leche desnat.',30, 1, 'Primera',120,100,300);
INSERT INTO ARTICULOS VALUES ('Leche semi.',30, 1, 'Primera',130,110,300);
INSERT INTO ARTICULOS VALUES ('Leche entera',30, 2, 'Primera',210,200,300);
INSERT INTO ARTICULOS VALUES ('Leche desnat.',30, 2, 'Primera',220,200,300);
INSERT INTO ARTICULOS VALUES ('Leche semi.',30, 2, 'Primera',230,210,300);
INSERT INTO ARTICULOS VALUES ('Mantequilla',30, 1, 'Primera',510,400,200);
INSERT INTO ARTICULOS VALUES ('Mantequilla',30, 1, 'Segunda',450,340,200);

The ERROR:

Error Code: 1062. Duplicate entry 'Macarrones-20' for key 'PRIMARY'

If I delete that row gives me the same error but with 'Tallarines-20'

Sorry if there is any spell mistake. Thanks!

Answer 1

You are trying to insert two rows with the same primary key.

INSERT INTO ARTICULOS VALUES ('Tallarines',20, 2, 'Primera',120,100,100);
INSERT INTO ARTICULOS VALUES ('Tallarines',20, 1, 'Segunda',99,50,100);

You would probably need to add CATEGORIA to your primary key for table ARTICULOS because you are trying to insert multiple rows with the same primary key multiple times.

primary key (articulo,cod_fabricante, categoria)