CREATE TABLE assessment ( name VARCHAR PRIMARY KEY, bonus_weight DOUBLE NOT NULL, outof DOUBLE NOT NULL ); CREATE TABLE category ( category VARCHAR PRIMARY KEY, sort_order SMALLINT ); CREATE TABLE criterion ( criterion VARCHAR PRIMARY KEY, category VARCHAR NOT NULL, description VARCHAR NOT NULL, sort_order SMALLINT, weight REAL, min SMALLINT, max SMALLINT, special BOOLEAN, CONSTRAINT fk_criterion_category FOREIGN KEY(category) REFERENCES category( category) ); CREATE TABLE submission ( student VARCHAR PRIMARY KEY ); CREATE TABLE result ( student VARCHAR NOT NULL, criterion VARCHAR NOT NULL, result REAL NOT NULL, comment VARCHAR, CONSTRAINT pk_result PRIMARY KEY(student, criterion), CONSTRAINT fk_result_student FOREIGN KEY(student) REFERENCES submission( student), CONSTRAINT fk_result_criterion FOREIGN KEY(criterion) REFERENCES criterion( criterion) ); CREATE VIEW weighted_mark AS SELECT student, Sum(weighted) * (SELECT outof FROM assessment) AS MARK FROM (SELECT student, result, weight, max, ( result / max * ( weight / (SELECT Sum(weight) FROM criterion WHERE NOT special) ) ) AS WEIGHTED FROM result INNER JOIN criterion ON result.criterion = criterion.criterion WHERE NOT special) GROUP BY student; -- UNION is a hack to ensure we always get something even if there are no special criterion CREATE VIEW weighted_special AS SELECT student, Sum(special) * (SELECT bonus_weight FROM assessment) AS special FROM ( SELECT student, result AS SPECIAL FROM result INNER JOIN criterion ON criterion.criterion = result.criterion WHERE special UNION ALL SELECT DISTINCT student, 0 FROM result ) GROUP BY student CREATE VIEW mark AS SELECT weighted_mark.student, Round(Casewhen(mark + special <= (SELECT outof FROM assessment), mark + special, ( SELECT outof FROM assessment)), 5) AS MARK FROM weighted_mark INNER JOIN weighted_special ON weighted_mark.student = weighted_special.student; CREATE VIEW marking_schedule AS SELECT criterion.category, description, weight, max AS OUTOF FROM criterion INNER JOIN category ON category.category = criterion.category ORDER BY category.sort_order, criterion.sort_order; CREATE VIEW feedback AS SELECT student, category.category, comment FROM criterion INNER JOIN result ON result.criterion = criterion.criterion INNER JOIN category ON criterion.category = category.category WHERE comment <> '' ORDER BY category.sort_order, criterion.sort_order; CREATE VIEW allmarks("Student", "Weighted Mark") AS SELECT submission.student, COALESCE(Cast(Round(mark, 2) AS VARCHAR), '') FROM submission LEFT JOIN mark ON submission.student = mark.student