Question

我有两张桌子;

技术查找表

OSID  OSValue  

1     UNIX             
2     ORACLE            
3     .NET 
4     SQL    
5     SAP  

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

员工技术

empID   OSID

34      1
37      2
45      2
34      4
45      6

员工ID NO 37不再使用ORACLE。他转向SAP。那就是OSID应该在第二个表中从2更新为5。

我有一个临时表，其中包含技术和员工ID

的值

请帮帮我 - 编写一个连接上述两个表的查询 - 查找SAP技术的ID，并使用该ID更新第二个表。

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

将查找表加入临时表，然后使用该表中的ID更新employee_tech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

从我的头脑中，未经测试：

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

如果临时表中的“技术”等于ID，则可以像这样更新。

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

使用查找表的SQL Server 2005更新查询

3 个答案: