INSERT INTO inventory (merchant_id, material_name, quantity, unit, min_threshold) VALUES (#{merchantId}, #{materialName}, #{quantity}, #{unit}, #{minThreshold}) SELECT * FROM inventory WHERE merchant_id = #{merchantId} ORDER BY material_name SELECT * FROM inventory WHERE id = #{id} SELECT * FROM inventory WHERE merchant_id = #{merchantId} AND material_name = #{materialName} LIMIT 1 SELECT * FROM inventory WHERE merchant_id = #{merchantId} AND quantity <= min_threshold ORDER BY quantity ASC UPDATE inventory quantity = #{quantity}, unit = #{unit}, min_threshold = #{minThreshold}, last_in_time = #{lastInTime}, last_out_time = #{lastOutTime}, WHERE id = #{id} DELETE FROM inventory WHERE id = #{id}