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02.10.2005 at 01:58AM PST, ID: 21309246
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8.2

Why my inner join has this error, No column was specified for column 2 of 'R2'.?

Asked by yangbin991 in .NET

Tags: ,

select r1.TR_INT_TAGID,
       r1.TR_INT_READERID
FROM TBL_READER as r1
INNER JOIN
(
      Select TR_INT_TAGID,
      max(TR_INT_TAGAGE)
      from TBL_READER
      GROUP BY TR_INT_TAGID
) as R2
ON R2.TR_INT_TAGID = r1.TR_INT_TAGID

I wanna select reader id and tag id for each tag whose has maximun tag age.
For example: i have tag1,2, 3,4.
Then I should get the reader id of tag 1,2,3,4 record at which maximum occured.

I get the error for that sql statement: Server: Msg 8155, Level 16, State 2, Line 1
No column was specified for column 2 of 'R2'.Start Free Trial
[+][-]02.10.2005 at 02:59AM PST, ID: 13273972

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About this solution

Zone: .NET
Tags: specified, 2
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Solution Provided By: adathelad
Participating Experts: 1
Solution Grade: A
 
 
 
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