PortfolioProjects/Data Exploration Project.sql at main · The25thEllis/PortfolioProjects · GitHub

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select*
from PortfolioProject..CovidDeaths$
order by 3,4

--select*
--from PortfolioProject..CovidVaccinations$
--order by 3,4

select location, date, total_cases, new_cases, total_deaths, population
from PortfolioProject..CovidDeaths$
order by 1,2

--Looking at total cases vs Total Deaths
--Shows the likelihood of dying

select location, date, total_cases, total_deaths, (total_deaths/total_cases)*100 as DeathPercentage
from PortfolioProject..CovidDeaths$
where location like '%Nigeria%'
order by 1,2

--Looking at Total cases vs Population
--Shows what percentage of population got Covid

select location, date, population, total_cases, (total_cases/population)*100 as PercentPopulationInfected
from PortfolioProject..CovidDeaths$
where location like '%Nigeria%'
order by 1,2

--Looking at countries with highest infection rate compared to the population

select location, population, max(total_cases) as HighestInfectionCount, max((total_cases/population))*100 as PercentPopulationInfected
from PortfolioProject..CovidDeaths$
--where location like '%Nigeria%'
group by location, population
order by PercentPopulationInfected desc

--Showing Countires with Highest death count per population

select location, MAX(cast(total_deaths as int)) as TotalDeathCount
from PortfolioProject..CovidDeaths$
--where location like '%Nigeria%'
where continent is not null
group by location, population
order by TotalDeathCount desc

--Lets break things down by continent


--showing the Continents with Highest death count per population
select continent, MAX(cast(total_deaths as int)) as TotalDeathCount
from PortfolioProject..CovidDeaths$
--where location like '%Nigeria%'
where continent is not null
group by continent
order by TotalDeathCount desc


--Global numbers

select 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 PortfolioProject..CovidDeaths$
--where location like '%Nigeria%'
where continent IS NOT NULL
--group by date
order by 1,2

--Looking at Total Population vs Vaccinations

select dea.continent, dea.location, dea.date, dea.population, vac.new_vaccinations,
SUM(convert(int,vac.new_vaccinations)) over (partition by dea.location order by dea.location, dea.date) as RollingPeopleVaccinated
from PortfolioProject..CovidDeaths$ dea
join PortfolioProject..CovidVaccinations$ vac
on dea.location = vac.location
and dea.date = vac.date
where dea.continent IS NOT NULL
order by 2,3

--use CTE

with PopvsVac (Continent, Location, Date, Population, new_vaccinations, RollingPeopleVaccinated)
as
(
select dea.continent, dea.location, dea.date, dea.population, vac.new_vaccinations,
SUM(convert(int,vac.new_vaccinations)) over (partition by dea.location order by dea.location, dea.date) as RollingPeopleVaccinated
from PortfolioProject..CovidDeaths$ dea
join PortfolioProject..CovidVaccinations$ vac
on dea.location = vac.location
and dea.date = vac.date
where dea.continent IS NOT NULL
--order by 2,3
)
select *, (RollingPeopleVaccinated/Population) * 100
from PopvsVac

--Using Temp Table
drop table if exists #PercentPopulationVaccinated
create table #PercentPopulationVaccinated
(
Continent nvarchar(255),
Location nvarchar(255),
Date datetime,
Poppulation numeric,
New_vaccinations numeric,
RollingPeopleVaccinated numeric
)
insert into  #PercentPopulationVaccinated
select dea.continent, dea.location, dea.date, dea.population, vac.new_vaccinations,
SUM(convert(int,vac.new_vaccinations)) over (partition by dea.location order by dea.location, dea.date) as RollingPeopleVaccinated
from PortfolioProject..CovidDeaths$ dea
join PortfolioProject..CovidVaccinations$ vac
on dea.location = vac.location
and dea.date = vac.date
where dea.continent IS NOT NULL
--order by 2,3

select *, (RollingPeopleVaccinated/Poppulation) * 100
from #PercentPopulationVaccinated


--create view to store data for later
 create view PercentPopulationVaccinated as
select dea.continent, dea.location, dea.date, dea.population, vac.new_vaccinations,
SUM(convert(int,vac.new_vaccinations)) over (partition by dea.location order by dea.location, dea.date) as RollingPeopleVaccinated
from PortfolioProject..CovidDeaths$ dea
join PortfolioProject..CovidVaccinations$ vac
on dea.location = vac.location
and dea.date = vac.date
where dea.continent IS NOT NULL
--order by 2,3

select *
from PercentPopulationVaccinated