I have performed data analysis using SQL on the files CovidDeaths.csv and CovidVaccinations.csv and with help of that created Tableau Tables(1-4).

Refer SQL_Data_Exploration.sql to see SQL Queries

See Data visualization dashboard here : https://public.tableau.com/views/Covid19data_16567049559600/Dashboard1?:language=en-US&:display_count=n&:origin=viz_share_link

Using Ms SQL Server I performed following tasks:

-Looking total cases vs total deaths
-Looking at countries with highest infection rate
-Looking at countries with highest death counts
-Breaking down by continent
-Global numbers
-Overal total cases
-looking at total population vs vaccination
-Using CTE,to getpopulation vs vaccination
-Creating view to store data for later visualizations

Then I used TableauTable(1-4) to create visualizations using tableau, reference to the dashboard is given above.