在Update语句中使用表别名的好方法？

我正在使用SQL Server,并尝试从同一个表中更新行.我想使用表别名来提高可读性.

这就是我现在这样做的方式:

UPDATE ra
SET ra.ItemValue = rb.ItemValue
FROM dbo.Rates ra
INNER JOIN  dbo.Rates rb
ON ra.ResourceID = rb.ResourceID
WHERE ra.PriceSched = 't8'
AND rb.PriceSched = 't9'

UPDATE ra 
   SET ra.ItemValue = rb.ItemValue
  FROM dbo.Rates ra
 INNER JOIN dbo.Rates rb
         ON ra.ResourceID = rb.ResourceID
WHERE ra.PriceSched = 't8'
  AND rb.PriceSched = 't9';