/// <summary>
/// 返回一个From节
/// </summary>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
public FromSection <T> From <T>(TableRelation <T> relation)
where T : Entity
{
FromSection <T> section = From <T>();
section.SetQuerySection(relation.Section.Query);
//给查询设置驱动与事务
section.Query.SetDbProvider(dbProvider, this);
return(section);
}
/// <summary>
/// 生成一个子查询
/// </summary>
/// <returns></returns>
public TableRelation <T> SubQuery()
{
section.SetQuerySection(section.SubQuery());
return(this);
}