How to set up GraphQl for Dotnet core with Dapper and Postgresql

There are many examples of how to set up graphql for dotnet connecting to a SQL Server db through Entity Framework, but no where could I find an example using dapper. Also all the examples and tutorials had a simple select from a single table, no mention of how to create joins and complex queries. Also many of the examples did not cover fully how to perform dependency injection of the data acces layer, I will cover that.

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