create a c# program using codex davinci to get natural language querys and transform to sql server database with a transaction and customers tables in csharp in csharp

First, you need to install the OpenAI.Codex.CSharp nuget package to use the Codex Davinci API.

Next, you can make use of the built-in language models in the Codex Davinci API to process natural language queries. Here's an example method to process a query and return the SQL command to retrieve data from the customers table:

main.cs
using OpenAI.Codex;
using OpenAI.Codex.CSharp;

public async Task<string> GetCustomerData(string query)
{
    CodexClient client = new CodexClient("YOUR_API_KEY");

    var completions = await client.Completions.CreateCompletionAsync(
        prompt: $"SELECT * FROM customers WHERE {query};",
        maxLength: 100,
        n: 1,
        stop: "\n"
    );

    return completions.Choices[0].Text;
}
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This method takes a natural language query as a string, and uses it to generate a SQL command using the Codex Davinci API. The SQL command is then returned as a string.

You can use this method to retrieve data from the customers table in your SQL Server database like this:

main.cs
using System.Data.SqlClient;

// get customer data from database
string query = "get customer data in london";
string sqlCommand = await GetCustomerData(query);

using (SqlConnection connection = new SqlConnection("YOUR_CONNECTION_STRING"))
using (SqlCommand command = new SqlCommand(sqlCommand, connection))
{
    connection.Open();
    using (SqlDataReader reader = command.ExecuteReader())
    {
        while (reader.Read())
        {
            // do something with the data
        }
    }
}
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This method uses the SqlConnection and SqlCommand classes to execute the SQL command that was generated by the GetCustomerData method. The resulting data is then available for further processing.

Note that you'll need to replace "YOUR_API_KEY" with your actual Codex Davinci API key, and "YOUR_CONNECTION_STRING" with the connection string for your SQL Server database.