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23 lines
701 B
23 lines
701 B
CREATE TABLE STUDENT (
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STUDENT_ID INT PRIMARY KEY,
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LASTNAME VARCHAR(40) NOT NULL,
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FIRSTNAME VARCHAR(40) NOT NULL,
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GENDER VARCHAR(1) NOT NULL,
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CONSTRAINT CHK_STUDENT_ID
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CHECK (STUDENT_ID>=100000 AND STUDENT_ID<=999999),
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CONSTRAINT CHK_GENDER
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CHECK (GENDER='m' OR GENDER='f')
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);
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CREATE TABLE EXAM (
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STUDENT_ID INT,
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COURSE VARCHAR(40),
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GRADE DECIMAL(2,1),
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ATTEMPT INT,
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CONSTRAINT PK PRIMARY KEY(STUDENT_ID, ATTEMPT, COURSE),
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CONSTRAINT CHK_ATTEMPT CHECK (ATTEMPT IN (1,2,3)),
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CONSTRAINT CHK_GRADE CHECK (
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GRADE IN (1.0,1.3,1.7,2.0,2.3,2.7,3.0,3.3,3.7,4.0,5.0)
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),
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CONSTRAINT FK_STUDENT_ID FOREIGN KEY (STUDENT_ID)
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REFERENCES STUDENT(STUDENT_ID) ON DELETE CASCADE
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);
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