多条件更新查询

saraou

我的例子里的更新查询Update top ten vendor_2，目的是想找出FOB排名前十位的supplier然后更新表supplier里面的字段Supplier type为top ten vendor。
但是现在用的方法写的sql语句很长。而且每个月做报告的时候排前十的supplier可能会改变。这样的话就要手动去更改Update top ten vendor_2 里面条件。
我做了一个查询Top ten vendor FOB Sum是找出FOB前十名的supplier的名单。

请问能否在更新查询Update top ten vendor_2的代码里面改写，让更新查询去判断表里的supplier是否存在于查询Top ten vendor FOB Sum中。如果存在，则进行更新。这样，每次前十名变动了就不用手动更改条件，减少出错的机会。
以下是更新查询的sql语句。

UPDATE Suppliers SET Suppliers.[Supplier type] = iif(Suppliers.[Supplier Name]="Mayumi's","Top ten vendor",iif(Suppliers.[Supplier Name]="Leka Trading","Top ten vendor",iif(Suppliers.[Supplier Name]="Formaggi Fortini s.r.l.","Top ten vendor",iif(Suppliers.[Supplier Name]="Refrescos Americanas LTDA","Top ten vendor",iif(Suppliers.[Supplier Name]="Pavlova, Ltd.","Top ten vendor",iif(Suppliers.[Supplier Name]="Ma Maison","Top ten vendor",iif(Suppliers.[Supplier Name]="Lyngbysild","Top ten vendor",iif(Suppliers.[Supplier Name]="Escargots Nouveaux","Top ten vendor",iif(Suppliers.[Supplier Name]="New England Seafood Cannery","Top ten vendor",iif(Suppliers.[Supplier Name]="Heli Süßwaren GmbH & Co. KG","Top ten vendor",Suppliers.[Supplier Name]))))))))))
WHERE Suppliers.[Supplier Name]="Mayumi's" or Suppliers.[Supplier Name]="Leka Trading" or Suppliers.[Supplier Name]="Formaggi Fortini s.r.l." or Suppliers.[Supplier Name]="Refrescos Americanas LTDA" or Suppliers.[Supplier Name]="Pavlova, Ltd." or Suppliers.[Supplier Name]="Ma Maison" or Suppliers.[Supplier Name]="Lyngbysild" or Suppliers.[Supplier Name]="Escargots Nouveaux" or Suppliers.[Supplier Name]="New England Seafood Cannery" or Suppliers.[Supplier Name]="Heli Süßwaren GmbH & Co. KG";

saraou

roych 发表于 2012-1-12 17:48
把条件改下：
In (select top 10 [supplier name] from [Top ten vendor FOB Sum])

之前没有看到你的附件。现在解决了。谢谢，真是高手。学到不少。

roych

把条件改下：
In (select top 10 [supplier name] from [Top ten vendor FOB Sum])

saraou

roych 发表于 2012-1-12 17:31
太复杂了……用子查询更新试试看？
UPDATE Suppliers SET Suppliers.[Supplier type] = "Top ten vendor"
...

用你的方法出来的结果是更新了Suppliers FOB Sum查询里面supplier按名字从a开始排序的前十个。而不是更新FOB排名前十的supplier。

roych

太复杂了……用子查询更新试试看？
UPDATE Suppliers SET Suppliers.[Supplier type] = "Top ten vendor"
WHERE (((Suppliers.[Supplier Name]) In (select top 10 [supplier name] from [Suppliers FOB Sum])));
里面写了一个宏，每次需要更新时执行即可。

todaynew

iif(Suppliers.[Supplier Name] in ("Mayumi's","Leka Trading","Formaggi Fortini s.r.l."),"Top ten vendor",Suppliers.[Supplier Name])