Clave compuesta de SQL
CREATE TABLE TABLE_NAME
(COLUMN_1, DATA_TYPE_1,
COLUMN_2, DATA_TYPE_2,
...
PRIMARY KEY (COLUMN_1, COLUMN_2, ...));
Good Gnat
CREATE TABLE TABLE_NAME
(COLUMN_1, DATA_TYPE_1,
COLUMN_2, DATA_TYPE_2,
...
PRIMARY KEY (COLUMN_1, COLUMN_2, ...));