Suppress SQL Queries logging in Entity Framework core

If you're using built-in logger, you can add filter to you ILoggingBuilder in Program.cs.

So, it can look like:

WebHost.CreateDefaultBuilder(args)
    // ...
    .ConfigureLogging((context, logging) => {
        var env = context.HostingEnvironment;
        var config = context.Configuration.GetSection("Logging");
        // ...
        logging.AddConfiguration(config);
        logging.AddConsole();
        // ...
        logging.AddFilter("Microsoft.EntityFrameworkCore.Database.Command", LogLevel.Warning);
    })
    // ...
    .UseStartup<Startup>()
    .Build();

Don't know if this is still an active question, but this is my solution, override the minimum level for "Microsoft.EntityFrameworkCore.Database.Command"

 Log.Logger = new LoggerConfiguration()
            .MinimumLevel.ControlledBy(loggingLevelSwitch)
            .MinimumLevel.Override("Microsoft.EntityFrameworkCore.Database.Command", Serilog.Events.LogEventLevel.Warning)
            .Enrich.WithProperty("app", environment.ApplicationName)
            .Enrich.FromLogContext()
            .WriteTo.RollingFile($"./Logs/{environment.ApplicationName}")
            .CreateLogger();

you can also have this on the appconfig.json

"Serilog": {
    "Using": [ "Serilog.Sinks.Console" ],
    "MinimumLevel": {
      "Default": "Verbose",
      "Override": {
        "Microsoft": "Warning",
        "Microsoft.EntityFrameworkCore.Database.Command": "Warning"
      }
    },
    "WriteTo": [
      {
        "Name": "Console",
        "Args": {
          "outputTemplate": "[{Timestamp:u}] [{Level:u3}] {SourceContext} {Message:lj}{NewLine}{Exception}"
        }
      },
    ],
    "Enrich": [ "FromLogContext", "WithExceptionDetails" ]
  }

If you are using the default Logger, in the appsettings.json (or appesttings.Development.json for dev startup) file:

"Logging": {
    "LogLevel": {
      "Default": "Debug",
      "System": "Information",
      "Microsoft": "Warning"        <----
    }
},

Set it to Warning instead of Information.