10 lines
426 B
SQL
10 lines
426 B
SQL
CREATE TABLE IF NOT EXISTS `elective_groups` (
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`id` INT AUTO_INCREMENT PRIMARY KEY,
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`name` VARCHAR(255) NOT NULL,
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`school_id` INT NOT NULL,
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FOREIGN KEY (`school_id`) REFERENCES `schools`(`id`) ON DELETE CASCADE
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) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
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ALTER TABLE `subjects` ADD COLUMN `elective_group_id` INT DEFAULT NULL,
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ADD FOREIGN KEY (`elective_group_id`) REFERENCES `elective_groups`(`id`) ON DELETE SET NULL;
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