SQL多次指定列“Id”

Question

  

可能重复：
  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;

我收到此错误：

  

'tb'多次指定了列'Id'。

Answer 1

而不是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。

for explame：[3D_Benchmarks] .id as aid，3D_Slugs.id as bid