Question

我有以下临时表结构：

CREATE TABLE #TempTable  (  
    ID INT,  
    CId TINYINT,  
    TagId INT,  
    Beginning_X DECIMAL(18,5),  
    Beginning_Y DECIMAL(18,5),  
    Ending_X DECIMAL(18,5),  
    Ending_Y DECIMAL(18,5))  

INSERT INTO #TempTable (ID, CId, TagId, Beginning_X, Beginning_Y)  
SELECT ID, CId,TagId, X, Y  
  FROM Table_1  
 WHERE IsRepeat = 1  

INSERT INTO #TempTable(Ending_X, Ending_Y)   
SELECT X,Y  
  FROM Table_1 t  
 WHERE t.ID IN (SELECT ID+1
                  FROM Table_1
                 where IsRepeat = 1))

第二个插入删除了第一个insert语句中的所有值，我无法弄清楚原因。我想将第二个插入的结果附加到第一个插入，并有一个实体表。

编辑：我认为我找到了解决方案：

UPDATE t  
SET t.Ending_X = p.X, t.Ending_Y = p.Y  
FROM  #TempTable t, Table_1 p  
WHERE p.ID IN (SELECT ID+1 FROM Table_1 where IsRepeat = 1)  
AND p.ID-1 = t.ID

Answer 1

我认为你需要这个

UPDATE t
SET Ending_X = X, Ending_Y = Y
FROM  #TempTable t
WHERE t.ID IN (SELECT ID+1 FROM Table_1 where IsRepeat = 1))

Answer 2

如何合并两个查询

INSERT INTO #TempTable (ID, CId, TagId, Beginning_X, Beginning_Y)
SELECT ID, CId,TagId, X, Y
from Table_1
WHERE IsRepeat = 1 
  UNION
SELECT Convert(Null, int) AS ID, Convert(Null, tinyint) AS CId, 
  Convert(Null, int) AS TagId, X,Y
FROM Table_1 t
WHERE t.ID IN (SELECT ID+1 FROM Table_1 where IsRepeat = 1))

使用新值更新临时表中的列

2 个答案: