13 lines
516 B
SQL
13 lines
516 B
SQL
CREATE TABLE IF NOT EXISTS workloads (
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id INT AUTO_INCREMENT PRIMARY KEY,
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class_id INT NOT NULL,
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subject_id INT NOT NULL,
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teacher_id INT NOT NULL,
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lessons_per_week INT NOT NULL,
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created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
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FOREIGN KEY (class_id) REFERENCES classes(id) ON DELETE CASCADE,
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FOREIGN KEY (subject_id) REFERENCES subjects(id) ON DELETE CASCADE,
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FOREIGN KEY (teacher_id) REFERENCES teachers(id) ON DELETE CASCADE,
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UNIQUE KEY (class_id, subject_id, teacher_id)
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);
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