如何在EFCore中将数据插入表时运行子查询

// 定义实体模型
public class Order
{
    public int Id { get; set; }
    public string CustomerName { get; set; }
    public decimal TotalAmount { get; set; }
}

// 定义上下文类
public class OrderContext : DbContext
{
    public DbSet<Order> Orders { get; set; }

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        optionsBuilder.UseSqlServer("YourConnectionString"); // 替换为您的数据库连接字符串
    }
}

// 执行插入操作
using (var context = new OrderContext())
{
    var subQuery = context.Orders.Where(o => o.TotalAmount > 1000); // 定义子查询
    var newOrder = new Order { CustomerName = "John Doe", TotalAmount = 1500 };

    var ordersToInsert = subQuery.Select(o => new Order { CustomerName = o.CustomerName, TotalAmount = o.TotalAmount });

    context.Orders.AddRange(ordersToInsert); // 添加插入操作
    context.Orders.Add(newOrder);

    context.SaveChanges(); // 执行插入操作
}