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Update 1322_Ads_Performance.sql #9

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Update 1322_Ads_Performance.sql #9

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20 changes: 14 additions & 6 deletions PIVOT-UNPIVOT/1322_Ads_Performance.sql
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Original file line number Diff line number Diff line change
@@ -1,15 +1,23 @@
-- Calculate the Click-Through Rate (CTR) for each ad
WITH tb1 AS (
SELECT ad_id, [Clicked], [Viewed], [Ignored]
SELECT
ad_id,
ISNULL([Clicked], 0) AS Clicked,
ISNULL([Viewed], 0) AS Viewed,
ISNULL([Ignored], 0) AS Ignored
FROM Ads
PIVOT (
COUNT(action) FOR action IN ([Clicked], [Viewed], [Ignored])
) pvt
COUNT(action)
FOR action IN ([Clicked], [Viewed], [Ignored])
) AS pvt
)

SELECT ad_id,
SELECT
ad_id,
-- Calculate the CTR (Click-Through Rate) as a percentage
CASE
WHEN SUM(Clicked+Viewed) = 0 THEN 0.0
ELSE CAST(SUM(Clicked)*100.0/SUM(Clicked+Viewed) AS DECIMAL(5,2))
WHEN SUM(Clicked + Viewed) = 0 THEN 0.0
ELSE CAST(SUM(Clicked) * 100.0 / SUM(Clicked + Viewed) AS DECIMAL(5, 2))
END AS ctr
FROM tb1
GROUP BY ad_id
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