select C.CenterID
from dbo.Center C
inner join (select PersonID, max(EffectiveDate) as EffectiveDate
from Center
where EffectiveDate <= getdate()
group by PersonID) as C2
on C.Per
我有一个数组属性的对象，我想在数据库中作为分隔字符串持久化。如何将该属性映射到数据库中的字段并反之亦然？ public class User() {
public int Id { get; set; }
public string[] Roles { get; set; }
}
不完全配置类： public class UserConfig : EntityTypeCo
嗨孩子的关系我已经运行如下与抽象基类及其实现 public class SuperParent
{
public ICollection<Parent> ParentList { get; set; }
}
public abstract class Parent
{
public int Id { get; set; }
public string Tit