ormLiteOperatorString

using System;
using System.Collections.Generic;
using ServiceStack;
using ServiceStack.Text;
using ServiceStack.OrmLite;
using ServiceStack.OrmLite.Sqlite;
using ServiceStack.DataAnnotations;

var dbFactory = new OrmLiteConnectionFactory(":memory:", SqliteDialect.Provider);
var db = dbFactory.Open(); // Open ADO.NET DB Connection

public class Price
{
    public Guid Id { get; set; }                     // 'Id' is PrimaryKey by convention

    public string PriceDate {get;set;}
}



// Delete and Recreate above schema
if (!db.TableExists<Price>())
    db.CreateTable<Price>();                          // Delete ForeignKey data if exists

var savedPrice = new Price
{
    Id = Guid.NewGuid(),
    PriceDate = "20180101"
};
db.Insert(savedPrice);
var savedPrice2 = new Price
{
    Id = Guid.NewGuid(),
    PriceDate = "20180102"
};
db.Insert(savedPrice2);


// Load Player Record and its Referenced Data
var dbPlayer = db.Select<Price>(ar => ar.PriceDate <= "20180101");

dbPlayer.PrintDump();