Ecosyste.ms: Awesome
An open API service indexing awesome lists of open source software.
https://github.com/mrjaid23/covid19-data-analysis---sql-data-exploration
SQL Data Exploration
https://github.com/mrjaid23/covid19-data-analysis---sql-data-exploration
dataexploration sql sql-joins
Last synced: about 1 month ago
JSON representation
SQL Data Exploration
- Host: GitHub
- URL: https://github.com/mrjaid23/covid19-data-analysis---sql-data-exploration
- Owner: mrjaid23
- Created: 2024-08-02T09:35:05.000Z (5 months ago)
- Default Branch: main
- Last Pushed: 2024-08-04T17:53:42.000Z (5 months ago)
- Last Synced: 2024-08-05T14:55:42.724Z (5 months ago)
- Topics: dataexploration, sql, sql-joins
- Language: TSQL
- Homepage:
- Size: 11.3 MB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# SQL Data Exploration
## SQL Data exploration techniques was performed on the WORLD's COVID-19 Dataset downloaded from OURWOLRD IN DATA's website
[Dataset can be downloaded here](https://ourworldindata.org/covid-deaths)
- Skills used: CASE Statements, Joins, CTE, Temp Tables, Windows Functions, Aggregate Functions, Operators, ALIASING, Creating Views, Converting Data Types
-RENAMING TABLES
```
EXEC sp_rename '[dbo].[CovidDeaths$]', 'CovidDeaths';
```
```
EXEC sp_rename '[dbo].[CovidVaccinations$]', 'CovidVaccinations'
```
--EXPLORING DATA FROM EACH TABLE
```
SELECT *
FROM CovidDeaths
SELECT *
FROM CovidVaccinations
```
-- SELECTING REQUIRED DATA FROM dbo.CovidDeaths FOR EXPLORATION
```
SELECT Continent, Location, Date, Total_cases, New_cases, Total_deaths, Population
FROM CovidDeaths
ORDER BY 1,2,3;
```
-- FILTERING OFF CONTINENTS WITH NULL VALUES
```
SELECT Continent, Location, Date, Total_cases, New_cases, Total_deaths, Population
FROM CovidDeaths
WHERE Continent IS NOT NULL
ORDER BY 1,2,3;
```
-- LIKELIHOOD OF DIEING DUE TO COVID (Total_case Vs Total_deaths) as DeathRateduetoCovid
```
SELECT Continent, Location, Date, Total_cases, Total_deaths, (Total_deaths/Total_cases)*100 AS PercentageDeathRateDuetoCovid
FROM CovidDeaths
WHERE Continent IS NOT NULL
ORDER BY 1,2,3;
```
```
SELECT continent, Location, date, total_cases, total_deaths,
CASE
WHEN total_cases = 0 THEN 0
ELSE (total_deaths / total_cases) * 100 END AS PercentageDeathRate
FROM CovidDeaths
WHERE continent IS NOT NULL
ORDER BY 1,2,3;
```
-- EXPLORING DATA FOR SPECIFIC REGION e.g; United Kingdom
```
SELECT continent, Location, date, total_cases, total_deaths,
CASE
WHEN total_cases = 0 THEN 0
ELSE (total_deaths / total_cases) * 100 END AS PercentageDeathRate
FROM CovidDeaths
WHERE continent IS NOT NULL AND Location like '%kingdom%'
ORDER BY 1,2,3;
```
-- PREVALENCE RATE of COVID per Day - Total Cases vs Population
```
SELECT continent, Location, date, total_cases, population, (total_cases/population)*100 AS PrevalenceRate
FROM [dbo].[CovidDeaths]
WHERE continent IS NOT NULL
ORDER BY 1,2,3;
```
--The United Kingdom's PREVALENCE RATE of COVID per Day
```
SELECT continent, Location, date, total_cases, population, (total_cases/population)*100 AS PrevalenceRate
FROM [dbo].[CovidDeaths]
WHERE continent IS NOT NULL AND Location like '%Kingdom'
ORDER BY 1,2,3;
```
-- COUNTRIES WITH HIGHEST INFECTION RATE PER POPULATION
```
SELECT continent, Location, Population, MAX(total_cases) AS HighestInfectionCount, MAX((total_cases/population))*100 AS PercentPopulationINfected
FROM [dbo].[CovidDeaths]
WHERE continent IS NOT NULL
GROUP BY continent, Location, Population
ORDER BY 4 DESC;
```
-- COUNTRIES WITH THE HIGHEST DEATH COUNT PER POPULATION
```
SELECT continent, Location, MAX(cast(total_deaths as bigint)) AS TotalDeathCount
FROM [dbo].[CovidDeaths]
WHERE continent IS NOT NULL
GROUP BY continent, Location
ORDER BY 3 DESC;
```
-- DEATH RATE BY CONTINENT
```
SELECT continent, MAX(cast(total_deaths as bigint)) AS TotalDeathCount
FROM [dbo].[CovidDeaths]
WHERE continent IS NOT NULL
GROUP BY continent
ORDER BY 2 DESC;
```
--GLOBAL NUMBERS PER DAY
```
SELECT Date, SUM(new_cases) AS total_cases, SUM(cast(new_deaths as int)) AS total_deaths,
CASE
WHEN SUM(new_cases) = 0 THEN 0
ELSE SUM(cast(new_deaths as int))/ SUM(new_cases)*100
END AS PercentageDeathRate
FROM [dbo].[CovidDeaths]
WHERE continent IS NOT NULL
GROUP BY Date
ORDER BY Date;
```
-- EXPLORE VACCINATION TABLE
```
SELECT *
FROM [dbo].[CovidVaccinations]
```
-- JOIN BOTH TABLES
```
SELECT *
FROM [dbo].[CovidDeaths] AS dea
JOIN [dbo].[CovidVaccinations] AS vac
ON dea.location = vac.location
and dea.date = vac.date
```
-- Exploring Total Population vs Vaccination / day
```
SELECT dea.continent, dea.location, dea.date, dea.population, vac.new_vaccinations
FROM [dbo].[CovidDeaths] AS dea
JOIN [dbo].[CovidVaccinations] AS vac
ON dea.location = vac.location
and dea.date = vac.date
WHERE dea.continent IS NOT NULL
ORDER BY 2,3;
```
-- Vaccination Overview of The UK
```
SELECT dea.continent, dea.location, dea.date, dea.population, vac.new_vaccinations
FROM [dbo].[CovidDeaths] AS dea
JOIN [dbo].[CovidVaccinations] AS vac
ON dea.location = vac.location
and dea.date = vac.date
WHERE dea.continent IS NOT NULL AND dea.location like '%Kingdom%'
ORDER BY 2,3;
```
-- PARTITIONING VACCINATION COUNT BY LOCATION
```
SELECT dea.continent, dea.location, dea.date, dea.population, vac.new_vaccinations, SUM(CONVERT(bigint, vac.new_vaccinations)) OVER (PARTITION BY dea.location ORDER BY dea.location, dea.date ROWS UNBOUNDED PRECEDING) AS TotalVaccinationCount
FROM [dbo].[CovidDeaths] AS dea
JOIN [dbo].[CovidVaccinations] AS vac
ON dea.location = vac.location
AND dea.date = vac.date
WHERE dea.continent IS NOT NULL
ORDER BY dea.location, dea.date;
```
-- Using CTE to perform Calculation on Partition By in previous query
```
WITH PopVac (continent, location, date, Population, new_vaccinations, TotalVaccinationCount)
AS
(
SELECT dea.continent, dea.location, dea.date, dea.population, vac.new_vaccinations, SUM(CONVERT(bigint, vac.new_vaccinations)) OVER (PARTITION BY dea.location ORDER BY dea.location, dea.date ROWS UNBOUNDED PRECEDING) AS TotalVaccinationCount
FROM [dbo].[CovidDeaths] AS dea
JOIN [dbo].[CovidVaccinations] AS vac
ON dea.location = vac.location
AND dea.date = vac.date
WHERE dea.continent IS NOT NULL
--ORDER BY dea.location, dea.date
--GROUP BY dea.continent, dea.location, dea.date, dea.population, vac.new_vaccinations
)
SELECT *, (TotalVaccinationCount/population)*100 AS PercentageVacRatePerPop
FROM PopVac;
```
-- CREATING TABLE & INSERTING DATA
```
DROP TABLE IF EXISTS PercentageVacRatePerPop
CREATE TABLE PercentageVacRatePerPop
(
Continent nvarchar(255),
Location nvarchar(255),
Date datetime,
Population numeric,
New_Vaccinations numeric,
TotalVaccinationCount numeric
)
SELECT dea.continent, dea.location, dea.date, dea.population, vac.new_vaccinations, SUM(CONVERT(bigint, vac.new_vaccinations)) OVER (PARTITION BY dea.location ORDER BY dea.location, dea.date ROWS UNBOUNDED PRECEDING) AS TotalVaccinationCount
FROM [dbo].[CovidDeaths] AS dea
JOIN [dbo].[CovidVaccinations] AS vac
ON dea.location = vac.location
AND dea.date = vac.date
WHERE dea.continent IS NOT NULL
--ORDER BY dea.location, dea.date
--GROUP BY dea.continent, dea.location, dea.date, dea.population, vac.new_vaccinations
SELECT *, (TotalVaccinationCount/population)*100 AS PercentageVacRatePerPop
FROM PopVac;
```
-- CREATING A VIEW TABLE TO STORE DATA FOR LATER VISUALIZATIONS
```
CREATE VIEW PercentageVacRatePerPop_2 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 CummulatedVaccinations
FROM [dbo].[CovidDeaths] AS dea
JOIN [dbo].[CovidVaccinations] AS vac
ON dea.location = vac.location
and dea.date = vac.date
WHERE dea.continent IS NOT NULL;
```