دمج جميع المنتجات

-- كتلة المنتج الأولى منجزة لك، منقولة من الدرس السابق
WITH filtered_enom_gilpane_quality as (
    WITH enom_gilpane_quality as (
        SELECT part_id, ((rpm * watt) / size) as quality
        FROM (
            SELECT part_id, rpm, watt + (select avg(watt) from enom_gilpane) as watt, size
            FROM enom_gilpane
        )
    )

    SELECT *
    FROM enom_gilpane_quality
    WHERE quality > (select avg(quality) from enom_gilpane_quality)
),
-- ابنِ نفس الكتلة لكل من جداول المنتجات الثلاثة أدناه
filtered_castle_loctus_quality as (
    ____
),
filtered_honpan_bilopsa_quality as (
    ____
),
filtered_yurnol_qoltam_quality as (
    ____
),
-- كدّس الكتل الأربع فوق بعضها البعض مع الإبقاء على كل صف
quality_table as (
    SELECT * FROM filtered_enom_gilpane_quality
    ____
)

SELECT ____
FROM quality_table