Question

我想构建将在.net中使用的查询。下面你可以看到sql查询，任何人都可以给我等效的亚音速查询

SELECT DISTINCT
  a2.AccountID AS BID,
  a2.AccountName AS Brand
FROM
  Account a
  INNER JOIN Account a2 ON a.ParentID = a2.AccountID
WHERE
  a.AccountTypeID = 6
ORDER BY
  Brand

请帮帮我。

Answer 1

SubSonic 2或3？

使用SubSonic，你总是有一个很好的后门。

它在2.x中称为InlineQuery，在3.x中称为CodingHorror

例如：

var result = DB.Query().ExecuteReader("SELECT DISTINCT
      a2.AccountID AS BID,
      a2.AccountName AS Brand
   FROM Account a
     INNER JOIN Account a2 ON a.ParentID = a2.AccountID
   WHERE a.AccountTypeID = ?accounttypeid
   ORDER BY Brand", 6);

如果由于语法检查和sql转换而希望保持流畅的界面。这是我能想到的另一种方法（SubSonic 2.2）

        DataTable result = DB.Select(
                "a1." + Account.Columns.AccountId + " as BID",
                "a2." + Account.Columns.AccountName + " as Brand")
            .From(Account.Schema.QualifiedName + " a1")
            .InnerJoin(Account.Schema.QualifiedName + " a2", 
                      "a2." + Account.Columns.account_id,
                "a1", "a1." + Account.Columns.parent_id)
            .Where("a1." + Account.Columns.AccountTypeId).IsEqualTo(6)
            .OrderAsc("a2." + Account.Columns.AccountName)
            .ExecuteDataSet().Tables[0];

但我从来没有这样做过，我还没有验证过。但也许它有效。

Subsonic：自我加入查询需要

1 个答案: