无效的对象名称派生表

Question

我正在测试派生表查询。当我运行下面的查询时，它显示错误。

`Invalid object name 'result'.` 

我真的很惊讶。请问任何人请清楚我的怀疑为什么它会抛出这个奇怪的错误。

SELECT 
    * 
FROM (SELECT 
    1 AS ID, 
    'Mike' AS Name) [result] 
WHERE result.ID NOT IN (SELECT 
    ID 
FROM [result] 
WHERE Name = 'Mike') 

Answer 1

您无法重复使用该语法的派生表。
使用CTE（公用表表达式）。

with [result] as 
    (SELECT 
    1 AS ID, 
    'Mike' AS Name) 

SELECT 
    * 
FROM result 
WHERE result.ID NOT IN (SELECT 
    ID 
FROM [result] 
WHERE Name = 'Mike')