SELECT*
FROM PortfolioProject..CovidDeaths
WHERE continent is not null 
ORDER BY 3,4



--SELECT*
--FROM PortfolioProject..CovidVaccinations
--ORDER BY 3,4

-- Let's select the data that we are going to be using

SELECT location, date, total_cases, new_cases, total_deaths, population
FROM PortfolioProject..CovidDeaths
WHERE continent is not null 
ORDER BY 1,2

-- Looking at 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 DeathsPercentage
FROM PortfolioProject..CovidDeaths
where location like '%Nigeria' 
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 PercentPopulationInfected
FROM PortfolioProject..CovidDeaths
--where location like '%Nigeria' and continent is not null 
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 PortfolioProject..CovidDeaths
--where location like '%Nigeria'
WHERE continent is not null 
GROUP BY location, population
ORDER BY PercentPopulationInfected DESC	


-- Countries with Highest Death Count per Population

SELECT location, MAX(cast(total_deaths as int)) AS TotalDeathsCount
FROM PortfolioProject..CovidDeaths
--where location like '%Nigeria'
WHERE continent is not null 
GROUP BY location
ORDER BY TotalDeathsCount DESC	

-- BREAKING IT DOWN BY CONTINENT

-- Showing contintents with the highest death count per population

SELECT location, MAX(cast(total_deaths as int)) AS TotalDeathsCount
FROM PortfolioProject..CovidDeaths
--where location like '%Nigeria'
WHERE continent is null 
GROUP BY location
ORDER BY TotalDeathsCount DESC	


-- Showing contintents with the 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 DeathsPercentage
FROM PortfolioProject..CovidDeaths
--where location like '%Nigeria'
WHERE continent is not null 
--GROUP BY date
ORDER BY 1,2



-- Total Population vs Vaccinations
-- Shows Percentage of Population that has recieved at least one Covid Vaccine

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


-- Using CTE to perform Calculation on Partition By in previous query

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 AS PercentRollingPeopleVaccinated
FROM popvsvac


-- Using Temp Table to perform Calculation on Partition By in previous query

DROP TABLE IF EXISTS #PercentPopulationVaccinated

CREATE TABLE #PercentPopulationVaccinated
(
Continant nvarchar (255),
Location nvarchar (255),
Date datetime,
Population numeric,
New_Vaccination 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/Population)*100
FROM #PercentPopulationVaccinated


-- Creating Views to store data for later visualizations

--View 1 Percent Population Vaccinated

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


-- View 2 Global Deaths

CREATE VIEW GlobalDeaths AS
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 DeathsPercentage
FROM PortfolioProject..CovidDeaths
--where location like '%Nigeria'
WHERE continent is not null 
--GROUP BY date
--ORDER BY 1,2


--- VIEW 3 Deaths By Continent

CREATE VIEW Death_by_Continent AS
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


--VIEW 4 contintents with the highest death count per population

CREATE VIEW CountryWithHighestDeaths AS
SELECT location, MAX(cast(total_deaths as int)) AS TotalDeathsCount
FROM PortfolioProject..CovidDeaths
--where location like '%Nigeria'
WHERE continent is not null 
GROUP BY location
--ORDER BY TotalDeathsCount DESC	

SELECT*
FROM CountryWithHighestDeaths


---VIEW 5 -- Countries with Highest Infection Rate Compared to Population

CREATE VIEW HighestInfectionRate AS
SELECT location, population, MAX(total_cases) AS HighestInfectionCount, MAX((total_cases/population))*100 AS PercentPopulationInfected
FROM PortfolioProject..CovidDeaths
--where location like '%Nigeria'
WHERE continent is not null 
GROUP BY location, population
--ORDER BY PercentPopulationInfected DESC	

SELECT*
FROM HighestInfectionRate



-- VIEW 6 Total cases & population percentage infected


CREATE VIEW TotalCasesPercentageInfected AS
SELECT location, date,population total_cases, (total_cases/population)*100 AS PercentPopulationInfected
FROM PortfolioProject..CovidDeaths
--where location like '%Nigeria' and continent is not null 
--ORDER BY 1,2

SELECT* 
FROM TotalCasesPercentageInfected



-- VIEW 7 Total Cases vs Total Deaths in Nigeria

CREATE VIEW TotalCasesvsTotalDeaths AS
SELECT location, date, total_cases, total_deaths, (total_deaths/total_cases)*100 AS DeathsPercentage
FROM PortfolioProject..CovidDeaths
where location like '%Nigeria' 
--and continent is not null
--ORDER BY 1,2

SELECT*
FROM TotalCasesvsTotalDeaths


-- VIEW 8 Total Cases vs Total Deaths

CREATE VIEW CasesvsDeaths AS
SELECT location, date, total_cases, total_deaths, (total_deaths/total_cases)*100 AS DeathsPercentage
FROM PortfolioProject..CovidDeaths
--where location like '%Nigeria' and continent is not null
--ORDER BY 1,2

SELECT*
FROM CasesvsDeaths


```SQL