关于“透過 BigQuery 建構資料倉儲：挑戰實驗室”的评价

Raghavendra V. · 评论almost 2 years之前

Aritra M. · 评论almost 2 years之前

Swarnamoy C. · 评论almost 2 years之前

Aritra C. · 评论almost 2 years之前

Sai Babu N. · 评论almost 2 years之前

Excellent

Marcelo S. · 评论almost 2 years之前

Brunno A. · 评论almost 2 years之前

task 4 of form-2 is worded really bad - and I speak English. it is extremely vague

Craig A. · 评论almost 2 years之前

Rahmad N. · 评论almost 2 years之前

Marten G. · 评论almost 2 years之前

Zak B. · 评论almost 2 years之前

Rasika Shailesh T. · 评论almost 2 years之前

Task 2 Populate the mobility record data ALTER TABLE covid.oxford_policy_tracker ADD COLUMN population INT64, ADD COLUMN country_area FLOAT64, ADD COLUMN mobility STRUCT< avg_retail FLOAT64, avg_grocery FLOAT64, avg_parks FLOAT64, avg_transit FLOAT64, avg_workplace FLOAT64, avg_residential FLOAT64 > UPDATE `covid.oxford_policy_tracker` t0 SET t0.mobility.avg_retail = t1.avg_retail, t0.mobility.avg_grocery = t1.avg_grocery, t0.mobility.avg_parks = t1.avg_parks, t0.mobility.avg_transit = t1.avg_transit, t0.mobility.avg_workplace = t1.avg_workplace, t0.mobility.avg_residential = t1.avg_residential FROM ( SELECT country_region, date, AVG(retail_and_recreation_percent_change_from_baseline) as avg_retail, AVG(grocery_and_pharmacy_percent_change_from_baseline) as avg_grocery, AVG(parks_percent_change_from_baseline) as avg_parks, AVG(transit_stations_percent_change_from_baseline) as avg_transit, AVG(workplaces_percent_change_from_baseline) as avg_workplace, AVG(residential_percent_change_from_baseline) as avg_residential FROM `bigquery-public-data.covid19_google_mobility.mobility_report` GROUP BY country_region, date ) AS t1 WHERE CONCAT(t0.country_name, t0.date) = CONCAT(t1.country_region, t1.date) //Please ensure you've correctly & accurately populated the mobility column. Task 3 Query missing data in population & country_area columns SELECT DISTINCT country_name FROM `covid.oxford_policy_tracker` WHERE population is NULL UNION ALL SELECT DISTINCT country_name FROM `covid.oxford_policy_tracker` WHERE country_area IS NULL ORDER BY country_name ASC //Please run query against your table to return all countries missing population AND/OR country_area order by name. Task 4 Create a new table for country population data

John T. · 评论almost 2 years之前

Jerry K. · 评论almost 2 years之前

Saivarun T. · 评论almost 2 years之前

Tanmay R. · 评论almost 2 years之前

Shovidhyan D. · 评论almost 2 years之前

Komagal B. · 评论almost 2 years之前

Olufemi Opeyemi O. · 评论almost 2 years之前

Rishi G. · 评论almost 2 years之前

Enrico V. · 评论almost 2 years之前

Ramya M. · 评论almost 2 years之前