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Exercise for training databases with sql
Typology: Exercises
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create table covid ( country_code varchar(5), day_date date, new_cases int, new_deaths int, new_tests int, positive_rate decimal(5,3), new_vaccinations int, primary key (country_code,day_date)); create table pays ( iso_code varchar(5), continent_code varchar(5), country_name varchar(100), population int, density decimal(10,3), aged_65_older decimal(6,3), aged_70_older decimal(6,3), cv_deathrate decimal(6,3), diabete_prevalence decimal (6,3), hospital_beds_per_thousands decimal(6,3), life_expectancy decimal(6,3), hdi decimal(6,3), primary key(iso_code)); create table continent ( continent_code varchar(5), continent_name varchar(5), primary key(continent_code));