i HAVE FOLLOWING SCRIPT TO CREATE TABLE.
create table Grade_report (STUDENT_NUMBER SMALLINT NOT NULL, SECTION_ID SMALLINT NOT NULL, GRADE CHAR(1),
CONSTRAINT stno_secid PRIMARY KEY (STUDENT_NUMBER, SECTION_ID))
tHE BOLD line shows that it has two primary key. would that be possible to create two primary key for a single table?? If not then what does it for?? may be unique key???
anyone can explain me please.
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