Question

SQL Server管理工作室 -

我如何在一段时间内联合？

ParentID是ChildID的内部关系

WHILE EXISTS (SELECT ParentID FROM Table1)
    BEGIN 
        SELECT * FROM FinalTable WHERE FinalTableID = (SELECT c.ChildID FROM Table1 as c WHERE c.ChildID = (SELECT d.ChildID FROM Table1 as d WHERE d.ChildID = @MyCounter))
      IF(SELECT e.ParentID FROM Table1 as e WHERE e.ChildID = @MyCounter) IS NULL
        BREAK
      ELSE
      SET @MyCounter = (SELECT d.ParentID FROM Table1 as d WHERE d.ChildID = @MyCounter)
        CONTINUE
    END

此代码目前导致多个行集合包含不同的结果，是否可以将所有内容合并为完整的结果？

FinalTable 
-------------------------------
|     ID  Name  Text  ChildID
|  1  1   Foo1  Bar1  1
|  2  2   oof1  Bra1  1
|  3  3   ofo1  Rab1  1
--------------------------------

FinalTable 
--------------------
|     ID  Row2  Row3  ChildID
|  1  8   Foo2  Bar2  2
|  2  9   oof2  Bra2  2
|  3  10  ofo2  Rab2  2
--------------------

FinalTable 
--------------------
|     ID  Name  Text  ChildID
|  1  14  Foo3  Bar3  3
|  2  17  oof3  Bra3  3
|  3  19  ofo3  Rab3  3
--------------------

通缉结果：

FinalTable 
--------------------
|     ID  Name  Text  ChildID
|  1  1   Foo1  Bar1  1
|  2  2   oof1  Bra1  1
|  3  3   ofo1  Rab1  1
|  4  8   Foo2  Bar2  2
|  5  9   oof2  Bra2  2
|  6  10  ofo2  Rab2  2
|  7  14  Foo3  Bar3  3
|  8  17  oof3  Bra3  3
|  9  19  ofo3  Rab3  3
--------------------

Answer 1

您可以使用临时表并附加到

CREATE TABLE #FinalTable () -- should be same structure of FinalTable 
WHILE EXISTS (SELECT ParentID FROM Table1)
    BEGIN 
        INSERT INTO #FinalTable 
        SELECT * FROM FinalTable WHERE FinalTableID = (SELECT c.ChildID FROM Table1 as c WHERE c.ChildID = (SELECT d.ChildID FROM Table1 as d WHERE d.ChildID = @MyCounter))
      IF(SELECT e.ParentID FROM Table1 as e WHERE e.ChildID = @MyCounter) IS NULL
        BREAK
      ELSE
      SET @MyCounter = (SELECT d.ParentID FROM Table1 as d WHERE d.ChildID = @MyCounter)
        CONTINUE
    END

SQL如何将3个语句结果合并为一个结果

1 个答案: