making a composite key in sql code example
Example: sql composite key
CREATE TABLE TABLE_NAME
(COLUMN_1, DATA_TYPE_1,
COLUMN_2, DATA_TYPE_2,
....
PRIMARY KEY (COLUMN_1, COLUMN_2, ...));
CREATE TABLE TABLE_NAME
(COLUMN_1, DATA_TYPE_1,
COLUMN_2, DATA_TYPE_2,
....
PRIMARY KEY (COLUMN_1, COLUMN_2, ...));