-- 카테고리 값 정규화 (대문자를 소문자로 변경)
-- 기존 DIMENSION_DEFECT를 design_error로 변경
UPDATE issues SET category = 'design_error' WHERE category IN ('DIMENSION_DEFECT', 'dimension_defect');
UPDATE issues SET category = 'material_missing' WHERE category = 'MATERIAL_MISSING';
UPDATE issues SET category = 'incoming_defect' WHERE category = 'INCOMING_DEFECT';
UPDATE issues SET category = 'inspection_miss' WHERE category = 'INSPECTION_MISS';

-- 카테고리 값 확인
SELECT category, COUNT(*) FROM issues GROUP BY category;