如何在SQL中使用相同的表连接名称？

Question

我有一个表SiteUser与SiteUserID,FirstName,LastName和SiteUserParentID.

每个SiteUser都分配了一个引用SiteUserID的SiteUserParentID.

我想显示与SiteUser全名的关系以及他们分配给谁的全名.

做这个的最好方式是什么？

    SiteUserID, FirstName, LastName ParentID
      1       , John     , Doe     , 1
      2       , Sallie   , Smith   , 1

我正在寻找输出:

ChildName   , ParentName
John Doe    , John Doe
Sallie Smith, John Doe

我当然希望将其转储到asp.net转发器中,输出为:

John Doe is assigned to John Doe
Sallie Smith is assigned to John Doe

目前,我在看:

John Doe is assigned to 1
Sallie Smith is assigned to 1

使用以下内容:

    static public List<SiteUser> GetSiteUserListFullName()
{
    List<SiteUser> thelist = new List<SiteUser>();
    string sql = "select SiteUserID, SiteUserFirstName + ' ' + SiteUserLastName as SiteUserName, SiteUserParentID from SiteUsers where SiteUserActive = 1";
    SqlDataReader dr = DBUtil.FillDataReader(sql);

    while (dr.Read())
    {
        SiteUser obj = new SiteUser();

        obj.siteUserID = Convert.ToInt32(dr["siteUserID"].ToString());
        obj.siteUserFirstName = Convert.ToString(dr["siteUserName"].ToString());
        obj.siteUserParentID = Convert.ToInt32(dr["siteUserParentID"].ToString());
        thelist.Add(obj);
    }
    return thelist;
}

这在我的代码背后:

    repeaterTeams.DataSource = SiteUser.GetSiteUserListFullName();
    repeaterTeams.DataBind();

而这在前端:

<asp:Repeater ID="repeaterTeams" runat="server">
<HeaderTemplate>
    <table class="horTable">
    <tr class="tableHeader">
        <td class="first">Assignment</td>
        <td class="last">Edit</td>
    </tr>
</HeaderTemplate>
<ItemTemplate>
    <tr class="tableRow">
        <td><%#DataBinder.Eval(Container.DataItem, "SiteUserFirstName")%> is assigned to <%#DataBinder.Eval(Container.DataItem, "SiteUserParentID")%></td>
        <td class="last"><a href="selected-team.aspx?id=<%#DataBinder.Eval(Container.DataItem, "SiteUserID")%>">Select</a></td>
    </tr>
</ItemTemplate>
<FooterTemplate>
</table>
</FooterTemplate>

任何帮助表示赞赏.

谢谢!

Answer 1

您需要自己加入表.

例:

select 
    child.SiteUserFirstName + ' ' + child.SiteUserLastName as ChildName,
    parent.SiteUserFirstName + ' ' + parent.SiteUserLastName as ParentName 
from 
    SiteUsers as child
inner join 
    SiteUsers as parent on child.SiteUserParentID = parent.SiteuserID
where 
    child.SiteUserActive = 1