SQL列 'ID' 被指定多次

Question

Possible Duplicate:
sql 2005 - The column was specified multiple times

SELECT TOP(20) * 
    FROM (SELECT * 
      FROM [3D_Benchmarks] 
      JOIN [3D_Slugs] ON [3D_Benchmarks].Id = [3D_Slugs].BenchmarkId) AS tb 
ORDER BY tb.FPS DESC; 

我得到這個錯誤：

The column 'Id' was specified multiple times for 'tb'.

Answer 1

代替select *使用select table.columnname或tablename.*。

Answer 2

SELECT * 
      FROM [3D_Benchmarks] 
      JOIN [3D_Slugs] ON [3D_Benchmarks].Id = [3D_Slugs].BenchmarkId) AS tb 

3D_Benchmarks有id列，3D_Slugs也有id列。

爲explame：[3D_Benchmarks] .ID爲輔助，3D_Slugs.id作爲投標