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SQL Data Exploration using global covid dataset.sql
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SQL Data Exploration using global covid dataset.sql
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SELECT *
FROM [Portfolio Project].[dbo].[covid death]
ORDER BY 3,4
SELECT *
FROM [Portfolio Project].[dbo].[covid vaccinations]
ORDER BY 3,4
--select the date to start analysis from
Select Location, date, total_cases, new_cases, total_deaths, population
From [Portfolio Project].[dbo].[covid death]
Where continent is not null
order by 1,2
-- Total Cases vs Total Deaths
-- Shows likelihood of dying if you contract covid in your country
Select Location, date, total_cases,total_deaths, (total_deaths/total_cases)*100 as DeathPercentage
From [Portfolio Project].[dbo].[covid death]
Where location like '%Pak%' AND continent is not NULL
order by 1,2
-- Total Cases vs Population
-- Shows what percentage of population infected with Covid
Select Location, date, Population, total_cases, (total_cases/population)*100 as InfectedPopulationPercent
From [Portfolio Project].[dbo].[covid death]
order by 1,2
--Countries with Highest Infection Rate compared to Population
Select Location, Population, MAX(total_cases) as HighestInfectionCount, Max((total_cases/population))*100 as PercentPopulationInfected
From [Portfolio Project].[dbo].[covid death]
Group by Location, Population
order by PercentPopulationInfected DESC
-- Countries with Highest Death Count per Population
Select Location, MAX(cast(Total_deaths as int)) as TotalDeathCount
From [Portfolio Project].[dbo].[covid death]
--Where location like '%states%'
Where continent is not null
Group by Location
order by TotalDeathCount desc
-- BREAKING THINGS DOWN BY CONTINENT
-- Showing contintents with the highest death count per population
Select continent, MAX(cast(Total_deaths as int)) as TotalDeathCount
From [Portfolio Project].[dbo].[covid death]
Where continent is not null
Group by continent
order by TotalDeathCount desc
-- GLOBAL NUMBERS
Select continent, SUM(new_cases) as total_cases, SUM(cast(new_deaths as int)) as total_deaths, SUM(cast(new_deaths as int))/SUM(New_Cases)*100 as DeathPercentage
From [Portfolio Project].[dbo].[covid death]
where continent is not null
Group By continent
order by 1,2
-- Total Population vs Vaccinations
-- Shows Percentage of Population that has recieved at least one Covid Vaccine
SELECT death.continent, death.location, death.date, death.population, vaccinations.new_vaccinations,
SUM(CONVERT(int,vaccinations.new_vaccinations))
OVER (Partition by death.location Order BY death.location, death.Date) as RollingPeopleVaccinated
FROM [Portfolio Project].[dbo].[covid death] death
join [Portfolio Project].[dbo].[covid vaccinations] vaccinations
ON death.location = vaccinations.location
AND death.date = vaccinations.date
WHERE death.continent is not null
order by 2,3
-- Using CTE to perform Calculation on Partition By in previous query
With PopvsVac (Continent, Location, Date, Population, New_Vaccinations, RollingPeopleVaccinated)
as
(
Select death.continent, death.location, death.date, death.population, vaccinations.new_vaccinations
, SUM(CONVERT(int,vaccinations.new_vaccinations))
OVER (Partition by death.location Order BY death.location, death.Date) as RollingPeopleVaccinated
--, (RollingPeopleVaccinated/population)*100
FROM [Portfolio Project].[dbo].[covid death] death
join [Portfolio Project].[dbo].[covid vaccinations] vaccinations
ON death.location = vaccinations.location
AND death.date = vaccinations.date
WHERE death.continent is not null
--order by 2,3
)
Select *, (RollingPeopleVaccinated/Population)*100 as populationVSvaccination
From PopvsVac
-- Using Temp Table to perform Calculation on Partition By in previous query
DROP Table if exists #PercentPopulationVaccinated
Create Table #PercentPopulationVaccinated
(
Continent nvarchar(255),
Location nvarchar(255),
Date datetime,
Population numeric,
New_vaccinations numeric,
RollingPeopleVaccinated numeric
)
Insert into #PercentPopulationVaccinated
Select death.continent, death.location, death.date, death.population, vaccinations.new_vaccinations
, SUM(CAST(vaccinations.new_vaccinations AS bigint)) OVER (Partition by death.Location Order by death.location,death.Date) as RollingPeopleVaccinated
FROM [Portfolio Project].[dbo].[covid death] death
join [Portfolio Project].[dbo].[covid vaccinations] vaccinations
On death.location = vaccinations.location
and death.date = vaccinations.date
Select *, (RollingPeopleVaccinated/Population)*100 AS PercentPopulationVaccinated
From #PercentPopulationVaccinated
-- Creating View to store data for later visualizations
Create View PercentPopulationVaccinated AS
Select death.continent, death.location, death.date, death.population, vaccinations.new_vaccinations
, SUM(CAST(vaccinations.new_vaccinations AS bigint)) OVER (Partition by death.Location Order by death.location,death.Date) as RollingPeopleVaccinated
FROM [Portfolio Project].[dbo].[covid death] death
join [Portfolio Project].[dbo].[covid vaccinations] vaccinations
On death.location = vaccinations.location
and death.date = vaccinations.date
where death.continent is not null