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bookSales_wide.sql
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bookSales_wide.sql
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USE booksales;
SELECT * FROM newsletter;
SELECT * FROM web;
SELECT * FROM store;
-- Step 2
SELECT UserID, ROUND(SUM(PurchaseAmount),2) AS Purchases_Online, COUNT(PurchaseAmount) AS Visits_Online
FROM web
GROUP BY UserID;
SELECT UserID, ROUND(SUM(PurchaseAmount),2) AS Purchases_Store, COUNT(PurchaseAmount) AS Visits_Store
FROM store
GROUP BY UserID;
-- Step 3
SELECT web.UserID,
COALESCE(Purchases_Online, 0) AS Purchases_Online,
COALESCE(Visits_Online, 0) AS Visits_Online,
COALESCE(Purchases_Store, 0) AS Purchases_Store,
COALESCE(Visits_Store, 0) AS Visits_Store
FROM
(
SELECT UserID, ROUND(SUM(PurchaseAmount),2) AS Purchases_Online, COUNT(PurchaseAmount) AS Visits_Online
FROM web
GROUP BY UserID
) AS web
LEFT JOIN
(
SELECT UserID, ROUND(SUM(PurchaseAmount),2) AS Purchases_Store, COUNT(PurchaseAmount) AS Visits_Store
FROM store
GROUP BY UserID
) AS store
ON web.UserID = store.UserID
;
SELECT store.UserID AS UserID,
COALESCE(Purchases_Online, 0) AS Purchases_Online,
COALESCE(Visits_Online, 0) AS Visits_Online,
COALESCE(Purchases_Store, 0) AS Purchases_Store,
COALESCE(Visits_Store, 0) AS Visits_Store
FROM
(
SELECT UserID, ROUND(SUM(PurchaseAmount),2) AS Purchases_Online, COUNT(PurchaseAmount) AS Visits_Online
FROM web
GROUP BY UserID
) AS web
RIGHT JOIN
(
SELECT UserID, ROUND(SUM(PurchaseAmount),2) AS Purchases_Store, COUNT(PurchaseAmount) AS Visits_Store
FROM store
GROUP BY UserID
) AS store
ON web.UserID = store.UserID
;
SELECT web.UserID AS UserID,
COALESCE(Purchases_Online, 0) AS Purchases_Online,
COALESCE(Visits_Online, 0) AS Visits_Online,
COALESCE(Purchases_Store, 0) AS Purchases_Store,
COALESCE(Visits_Store, 0) AS Visits_Store
FROM
(
SELECT UserID, ROUND(SUM(PurchaseAmount),2) AS Purchases_Online, COUNT(PurchaseAmount) AS Visits_Online
FROM web
GROUP BY UserID
) AS web
LEFT JOIN
(
SELECT UserID, ROUND(SUM(PurchaseAmount),2) AS Purchases_Store, COUNT(PurchaseAmount) AS Visits_Store
FROM store
GROUP BY UserID
) AS store
ON web.UserID = store.UserID
UNION
SELECT store.UserID AS UserID,
COALESCE(Purchases_Online, 0) AS Purchases_Online,
COALESCE(Visits_Online, 0) AS Visits_Online,
COALESCE(Purchases_Store, 0) AS Purchases_Store,
COALESCE(Visits_Store, 0) AS Visits_Store
FROM
(
SELECT UserID, ROUND(SUM(PurchaseAmount),2) AS Purchases_Online, COUNT(PurchaseAmount) AS Visits_Online
FROM web
GROUP BY UserID
) AS web
RIGHT JOIN
(
SELECT UserID, ROUND(SUM(PurchaseAmount),2) AS Purchases_Store, COUNT(PurchaseAmount) AS Visits_Store
FROM store
GROUP BY UserID
) AS store
ON web.UserID = store.UserID
ORDER BY UserID;
-- Step 4
DROP TABLE IF EXISTS salesdw_wide;
CREATE TABLE salesdw_wide AS
(SELECT web.UserID,
COALESCE(Purchases_Online, 0) AS Purchases_Online,
COALESCE(Visits_Online, 0) AS Visits_Online,
COALESCE(Purchases_Store, 0) AS Purchases_Store,
COALESCE(Visits_Store, 0) AS Visits_Store
FROM
(
SELECT UserID, ROUND(SUM(PurchaseAmount),2) AS Purchases_Online, COUNT(PurchaseAmount) AS Visits_Online
FROM web
GROUP BY UserID
) AS web
LEFT JOIN
(
SELECT UserID, ROUND(SUM(PurchaseAmount),2) AS Purchases_Store, COUNT(PurchaseAmount) AS Visits_Store
FROM store
GROUP BY UserID
) AS store
ON web.UserID = store.UserID
UNION
SELECT store.UserID AS UserID,
COALESCE(Purchases_Online, 0) AS Purchases_Online,
COALESCE(Visits_Online, 0) AS Visits_Online,
COALESCE(Purchases_Store, 0) AS Purchases_Store,
COALESCE(Visits_Store, 0) AS Visits_Store
FROM
(
SELECT UserID, ROUND(SUM(PurchaseAmount),2) AS Purchases_Online, COUNT(PurchaseAmount) AS Visits_Online
FROM web
GROUP BY UserID
) AS web
RIGHT JOIN
(
SELECT UserID, ROUND(SUM(PurchaseAmount),2) AS Purchases_Store, COUNT(PurchaseAmount) AS Visits_Store
FROM store
GROUP BY UserID
) AS store
ON web.UserID = store.UserID
ORDER BY UserID);
SELECT * FROM salesdw_wide;
-- add newsletter
SELECT *, CASE
WHEN Newsletter.UserID IS NULL THEN 0
ELSE 1
END AS Newsletter
FROM salesdw_wide dw
LEFT JOIN Newsletter ON dw.UserID = Newsletter.UserID
;
ALTER TABLE salesdw_wide
ADD COLUMN Newsletter INT;
UPDATE salesdw_wide
LEFT JOIN Newsletter ON salesdw_wide.UserID = Newsletter.UserID
SET Newsletter = CASE
WHEN Newsletter.UserID IS NULL THEN 0
ELSE 1
END
;
SELECT * FROM salesdw_wide;
--
SELECT Newsletter,
SUM(Purchases_Online) AS Online_Total, SUM(Visits_Online) AS Online_Visits, SUM(Purchases_Online)/SUM(Visits_Online) AS Online_Avg,
SUM(Purchases_Store) AS Store_Total, SUM(Visits_Store) AS Store_Visits, SUM(Purchases_Store)/SUM(Visits_Store) AS Store_Avg
FROM salesdw_wide
GROUP BY Newsletter WITH ROLLUP;
SELECT Visits_Online, COUNT(*) AS Freq
FROM salesdw_wide
GROUP BY Visits_Online WITH ROLLUP;
SELECT Visits_Online, Visits_Store, COUNT(*) AS Freq
FROM salesdw_wide
GROUP BY Visits_Online, Visits_Store WITH ROLLUP;
-- alternate method
SELECT * FROM newsletter;
SELECT * FROM web;
SELECT * FROM store;
SELECT UserID, PurchaseAmount AS Purchase_Online, 0 AS Purchase_Store
FROM web
UNION
SELECT UserID, 0 AS Purchase_Online, PurchaseAmount AS Purchase_Store
FROM store
ORDER BY UserID, Purchase_Online DESC, Purchase_Store DESC;
SELECT UserID,
ROUND(SUM(Purchase_Online),2) AS Purchases_Online,
SUM(CASE WHEN Purchase_Online > 0 THEN 1 ELSE 0 END) AS Visits_Online,
ROUND(SUM(Purchase_Store),2) AS Purchases_Store,
SUM(CASE WHEN Purchase_Store > 0 THEN 1 ELSE 0 END) AS Visits_Store
FROM
(
SELECT UserID, PurchaseAmount AS Purchase_Online, 0 AS Purchase_Store
FROM web
UNION
SELECT UserID, 0 AS Purchase_Online, PurchaseAmount AS Purchase_Store
FROM store
) AS u
GROUP BY UserID
ORDER BY UserID;
SELECT summary.UserID, Purchases_Online, Visits_Online, Purchases_Store, Visits_Store,
CASE
WHEN Newsletter.UserID IS NULL THEN 0
ELSE 1
END AS Newsletter
FROM
(
SELECT UserID, ROUND(SUM(Purchase_Online),2) AS Purchases_Online, SUM(CASE WHEN Purchase_Online > 0 THEN 1 ELSE 0 END) AS Visits_Online,
ROUND(SUM(Purchase_Store),2) AS Purchases_Store, SUM(CASE WHEN Purchase_Store > 0 THEN 1 ELSE 0 END) AS Visits_Store
FROM
(
SELECT UserID, PurchaseAmount AS Purchase_Online, 0 AS Purchase_Store
FROM web
UNION
SELECT UserID, 0 AS Purchase_Online, PurchaseAmount AS Purchase_Store
FROM store
) AS u
GROUP BY UserID
) AS summary
LEFT JOIN Newsletter ON summary.UserID = Newsletter.UserID
ORDER BY summary.UserID;