SQL Server 2005更新與查詢表查詢

Question

我有兩個表;

技術查找表

OSID OSValue 

1  UNIX    
2  ORACLE    
3  .NET 
4  SQL  
5  SAP 

------------------ 

員工技術

empID OSID 

34  1 
37  2 
45  2 
34  4 
45  6 

員工ID號37是不使用Oracle。他轉移到SAP。那就是OSID應該在第二個表中從2更新到5。

我有了技術和員工ID瓦萊斯一個臨時表

請幫我 - 編寫連接兩個以上表的查詢 - 查找SAP技術的ID，並更新第二帶有該ID的表格。

Update emp 
Set emp.OSID = (Select OSID from technologylookup where OSValue = tmptbl.technologyname) 
FROM employee_tech emp INNER JOIN #Temptbl tmptbl ON emp.emp_id = tmptbl.emp_id 

Answer 1

加入您的查找表，臨時表，然後從該表

Update emp 
    Set emp.OSID = tl.OSID 
FROM employee_tech emp 
INNER JOIN #Temptbl tmptbl 
    ON emp.emp_id = tmptbl.emp_id 
INNER JOIN technologylookup tl 
    ON tl.OSValue COLLATE DATABASE_DEFAULT = tmptbl.technologyname 

Answer 2

從我腦袋裏的，未經測試的更新與ID的employee_tech表：

update employee_tech 
set osid = t.osid 
from #Temptbl tmp 
inner join employee_tech e on e.emp_id = tmp.emp_id 
inner join technologylookup t on t.osvalue = tmp.technologyname 

Answer 3

如果'臨時表'中的'技術'等於ID，您可以像這樣更新。

UPDATE employee_tech 
SET OSID = (SELECT technology FROM #Temptbl AS T INNER JOIN employee_tech AS E ON T.empID = E.empID)