-
Notifications
You must be signed in to change notification settings - Fork 0
/
Covid_Analysis_Project.sql
167 lines (126 loc) · 6.42 KB
/
Covid_Analysis_Project.sql
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
/*
Covid 19 Data Exploration
Analysis performed by - Syed Sarfaraz Ahmed
Skills used: Joins, CTE's, Temp Tables, Windows Functions, Aggregate Functions, Creating Views & Converting-Casting Data Types
*/
-- Viewing the datasets
SELECT * FROM Project_Portfolio.dbo.CovidDeaths
WHERE continent IS NOT NULL
SELECT * FROM Project_Portfolio.dbo.CovidVaccinations
WHERE continent IS NOT NULL
-- Selecting the data which is required for analysis
SELECT Location, date, total_cases, new_cases, total_deaths, population
FROM Project_Portfolio.dbo.CovidDeaths
WHERE continent IS NOT NULL
-- Looking at Total cases vs Total Deaths
-- This is performed in order to check the likelyhoof of dying if you contract covid in your country
SELECT Location, date, total_cases, total_deaths, CONVERT(DECIMAL(18, 2), (CONVERT(DECIMAL(18, 2), total_deaths) / CONVERT(DECIMAL(18, 2), total_cases)))*100 AS Death_Percentage
FROM Project_Portfolio.dbo.CovidDeaths
WHERE Location like '%India%' AND continent IS NOT NULL
-- Looking at Total Cases vs Population
-- Show what percentage of population got infected with covid Covid
SELECT Location, date, total_cases, Population, CONVERT(DECIMAL(18, 2), (CONVERT(DECIMAL(18, 2), total_cases) / CONVERT(DECIMAL(18, 2), Population)))*100 AS AffectedPopulationPercentage
FROM Project_Portfolio.dbo.CovidDeaths
WHERE Location like '%India%' AND continent IS NOT NULL
-- Country with highest infection rate with respective to their population
SELECT Location, Population, MAX(total_cases) as HighestInfectedCount, MAX((CONVERT(DECIMAL(18, 2), total_cases) / CONVERT(DECIMAL(18, 2), Population)))*100 AS AffectedPopulationPercentage
FROM Project_Portfolio.dbo.CovidDeaths
WHERE continent IS NOT NULL
GROUP BY Location, Population
ORDER BY AffectedPopulationPercentage DESC
-- Countries with Highest Death Count Per Population
SELECT location, MAX(CAST(total_deaths as int)) AS TotalDeathCount
FROM Project_Portfolio.dbo.CovidDeaths
WHERE continent IS NOT NULL
GROUP BY location
ORDER BY TotalDeathCount DESC
-- Countries with highest death rate
SELECT Location, Population, MAX(total_deaths) as HighestDeathCount, MAX((CONVERT(DECIMAL(18, 2), total_deaths) / CONVERT(DECIMAL(18, 2), Population)))*100 AS DeathRate
FROM Project_Portfolio.dbo.CovidDeaths
WHERE continent IS NOT NULL
GROUP BY Location, Population
ORDER BY DeathRate DESC
-- BREAKING THINGS DOWN BY CONTINENT
-- Lets search the highest death count by continent
SELECT location, MAX(CAST(total_deaths as int)) AS TotalDeathCount
FROM Project_Portfolio.dbo.CovidDeaths
WHERE continent IS NULL
GROUP BY location
ORDER BY TotalDeathCount DESC
-- Global Numbers
SELECT date, SUM(CAST(new_cases as int)) AS TotalCasesPerDay, SUM(CAST(new_deaths AS int)) AS TotalDeathsPerDay,
CONVERT(DECIMAL(18, 6), (CONVERT(DECIMAL(18, 6), SUM(CAST(new_deaths AS int))) / CONVERT(DECIMAL(18, 6), SUM(CAST(new_cases AS int)))))*100 AS DeathPercentPerDay
FROM Project_Portfolio.dbo.CovidDeaths
WHERE continent IS NOT NULL
GROUP BY date
SELECT SUM(CAST(new_cases as int)) AS TotalCases, SUM(CAST(new_deaths AS int)) AS TotalDeaths,
CONVERT(DECIMAL(18, 6), (CONVERT(DECIMAL(18, 6), SUM(CAST(new_deaths AS int))) / CONVERT(DECIMAL(18, 6), SUM(CAST(new_cases AS int)))))*100 AS DeathPercentage
FROM Project_Portfolio.dbo.CovidDeaths
WHERE continent IS NOT NULL
-- Joining both the tables
SELECT *
FROM Project_Portfolio.dbo.CovidDeaths CD
JOIN Project_Portfolio.dbo.CovidVaccinations CV
ON CD.location = CV.location
AND CD.date = CV.date
-- Total Population vs vaccinations
-- Shows Percentage of population that has received atleast one Covid Vaccine
SELECT CD.continent, CD.location, CD.date, CD.population, CV.new_vaccinations,
SUM(CAST(CV.new_vaccinations AS int)) OVER (PARTITION BY CD.location ORDER BY CD.location,
CD.date) AS CountOfPeopleVaccinated
FROM Project_Portfolio.dbo.CovidDeaths CD
JOIN Project_Portfolio.dbo.CovidVaccinations CV
ON CD.location = CV.location
AND CD.date = CV.date
WHERE CD.continent IS NOT NULL
ORDER BY 2,3
-- Use CTE to perform further calculation on partition by in Previous query
WITH PopVsVac (Continent, Location, Date, Population, New_Vaccinations, CountofPeopleVaccinated)
AS
(
SELECT CD.continent, CD.location, CD.date, CD.population, CV.new_vaccinations,
SUM(CAST(CV.new_vaccinations AS int)) OVER (PARTITION BY CD.Location ORDER BY CD.location,
CD.Date) AS CountOfPeopleVaccinated
FROM Project_Portfolio.dbo.CovidDeaths CD
JOIN Project_Portfolio.dbo.CovidVaccinations CV
ON CD.location = CV.location
AND CD.date = CV.date
WHERE CD.continent IS NOT NULL
-- ORDER BY 2,3
)
-- SELECT *, (CountofPeopleVaccinated/population)*100 AS PercentofCPV
SELECT *, CONVERT(DECIMAL(18, 6), (CONVERT(DECIMAL(18, 6), CountofPeopleVaccinated) / CONVERT(DECIMAL(18, 6), CAST(population AS int))))*100 AS DeathPercentage
FROM PopVsVac
-- Temp Table (Alternate for CTE's shows how to perform calculation on partition by in previous query)
-- Use DROP TABLE IF EXISTS tablename before create table if there is any requirement of alterations in the table
CREATE TABLE #PercentPopulationVaccinated
(
continent nvarchar(255),
Location nvarchar(255),
Date datetime,
Population numeric,
New_Vaccinations numeric,
CountofPeopleVaccinated numeric
)
INSERT INTO #PercentPopulationVaccinated
SELECT CD.continent, CD.location, CD.date, CD.population, CV.new_vaccinations,
SUM(CAST(CV.new_vaccinations AS int)) OVER (PARTITION BY CD.Location ORDER BY CD.location,
CD.Date) AS CountOfPeopleVaccinated
FROM Project_Portfolio.dbo.CovidDeaths CD
JOIN Project_Portfolio.dbo.CovidVaccinations CV
ON CD.location = CV.location
AND CD.date = CV.date
WHERE CD.continent IS NOT NULL
-- ORDER BY 2,3
SELECT *, CONVERT(DECIMAL(18, 6), (CONVERT(DECIMAL(18, 6), CountofPeopleVaccinated) / CONVERT(DECIMAL(18, 6), CAST(population AS int))))*100 AS DeathPercentage
FROM #PercentPopulationVaccinated ORDER BY 2,3
-- Creating Views to store data for later visualizations
CREATE VIEW PercentPopulationVaccinated AS
SELECT CD.continent, CD.location, CD.date, CD.population, CV.new_vaccinations,
SUM(CAST(CV.new_vaccinations AS int)) OVER (PARTITION BY CD.Location ORDER BY CD.location,
CD.Date) AS CountOfPeopleVaccinated
FROM Project_Portfolio.dbo.CovidDeaths CD
JOIN Project_Portfolio.dbo.CovidVaccinations CV
ON CD.location = CV.location
AND CD.date = CV.date
WHERE CD.continent IS NOT NULL