使用T-SQL列別名時無效的列名稱

Question

我開始使用T-SQL，但似乎誤解了列別名概念。我試過尋找一個沒有成功的答案，儘管我確信它對於一個更有經驗的開發人員來說肯定是非常簡單的。我正在使用SQL Server 2008。

select FirstName as nick 
from [Dev].[dbo].[Name] 
where nick like '%et%' 
order by nick desc 

錯誤：

Msg 207, Level 16, State 1, Line 2 Invalid column name 'nick'.

如何使這項工作？

Answer 1

select FirstName as nick 
from [Dev].[dbo].[Name] 
where FirstName like '%et%' -- There is no such column "nick" in your table 
order by 1 desc 

Answer 2

這應該這樣做。

SELECT FirstName as nick 
FROM Dev.dbo.Name 
WHERE FirstName like '%et%' 
ORDER BY FirstName DESC