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WITH wscs AS
( SELECT
sold_date_sk,
sales_price
FROM (SELECT
ws_sold_date_sk sold_date_sk,
ws_ext_sales_price sales_price
FROM web_sales) x
UNION ALL
(SELECT
cs_sold_date_sk sold_date_sk,
cs_ext_sales_price sales_price
FROM catalog_sales)),
wswscs AS
( SELECT
d_week_seq,
sum(CASE WHEN (d_day_name = 'Sunday')
THEN sales_price
ELSE NULL END)
sun_sales,
sum(CASE WHEN (d_day_name = 'Monday')
THEN sales_price
ELSE NULL END)
mon_sales,
sum(CASE WHEN (d_day_name = 'Tuesday')
THEN sales_price
ELSE NULL END)
tue_sales,
sum(CASE WHEN (d_day_name = 'Wednesday')
THEN sales_price
ELSE NULL END)
wed_sales,
sum(CASE WHEN (d_day_name = 'Thursday')
THEN sales_price
ELSE NULL END)
thu_sales,
sum(CASE WHEN (d_day_name = 'Friday')
THEN sales_price
ELSE NULL END)
fri_sales,
sum(CASE WHEN (d_day_name = 'Saturday')
THEN sales_price
ELSE NULL END)
sat_sales
FROM wscs, date_dim
WHERE d_date_sk = sold_date_sk
GROUP BY d_week_seq)
SELECT
d_week_seq1,
round(sun_sales1 / sun_sales2, 2),
round(mon_sales1 / mon_sales2, 2),
round(tue_sales1 / tue_sales2, 2),
round(wed_sales1 / wed_sales2, 2),
round(thu_sales1 / thu_sales2, 2),
round(fri_sales1 / fri_sales2, 2),
round(sat_sales1 / sat_sales2, 2)
FROM
(SELECT
wswscs.d_week_seq d_week_seq1,
sun_sales sun_sales1,
mon_sales mon_sales1,
tue_sales tue_sales1,
wed_sales wed_sales1,
thu_sales thu_sales1,
fri_sales fri_sales1,
sat_sales sat_sales1
FROM wswscs, date_dim
WHERE date_dim.d_week_seq = wswscs.d_week_seq AND d_year = 2001) y,
(SELECT
wswscs.d_week_seq d_week_seq2,
sun_sales sun_sales2,
mon_sales mon_sales2,
tue_sales tue_sales2,
wed_sales wed_sales2,
thu_sales thu_sales2,
fri_sales fri_sales2,
sat_sales sat_sales2
FROM wswscs, date_dim
WHERE date_dim.d_week_seq = wswscs.d_week_seq AND d_year = 2001 + 1) z
WHERE d_week_seq1 = d_week_seq2 - 53
ORDER BY d_week_seq1
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