here we have multiple pracrtial so you have to change between them.
here you have to update the we have to change the connection string according to the our database
every practical have the query file so you can create database according to that.
after that run practical if you get the roslyn error so you can solve for solving you have to write this command in package manager console:
Update-Package Microsoft.CodeDom.Providers.DotNetCompilerPlatform -r