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Re: SQL Query Help

From: <Reginald.W.Bailey_at_jpmorgan.com>
Date: Wed, 28 May 2003 18:08:27 -0800
Message-ID: <F001.005A50C3.20030528180827@fatcity.com>

RB:

Try :

SELECT ID, LastModDate
FROM Tab a
WHERE TRUNC(LastModDate) = (Select MAX(TRUNC(LastModDate)) From Tab b)

The explanation of the error message follows.

RWB


|-----------------------------------+----------------------------------->
|                                   |                                   |
|-----------------------------------+----------------------------------->
  >-------------------------------------------------------------------------------|

|Error: ORA 937 |
| |
| |
|Text: not a single-group group function |
| |
| |
|-------------------------------------------------------------------------------|
| |
| |
|Cause: A SELECT list cannot include both a group function, such as AVG, COUNT,|
| |
| |
| MAX, MIN, SUM, STDDEV, or VARIANCE, and an individual column |
| |
| |
| expression, unless the individual column expression is included in a |
| |
| |
| GROUP BY clause. |
| |
| |
|Action: Drop either the group function or the individual column expression |
| |
| |
| from the SELECT list or add a GROUP BY clause that includes all |
| |
| |
| individual column expressions listed. |
| |
| |
|. |
>-------------------------------------------------------------------------------| ============================================================================================================

Reginald W. Bailey
IBM Global Services - ETS SW GDSD - Database Management Your Friendly Neighborhood DBA
713-216-7703 (Office) 281-798-5474 (Mobile) 713-415-5410 (Pager)


                                                                                                                                    
                    Ravindra.Basavaraja_at_T-                                                                                          
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                    root_at_fatcity.com             Subject:     SQL Query Help                                                        
                                                                                                                                    
                                                                                                                                    
                    05/28/2003 07:14 PM                                                                                             
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                    ORACLE-L                                                                                                        
                                                                                                                                    
                                                                                                                                    




i have a query that returns 2 rows with one column being id and the other being date-time stamp.

i want to select the row with the latest timestamp among those two records.they have difference id values

SELECT ID,LastModDate
FROM Tab

ID         LastModDate
--         -----------
2          1/20/2003 2:56:18 AM
1          4/23/2003 10:26:42 PM

I want to modify the above query to return the row with id=1 which has the latest timestamp

I tried this

SELECT ID,MAX(LastModDate)
FROM Tab

getting this error
OERR: ORA 937 not a single-group group function

how do i get this work.

Thanks

--
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Author: Basavaraja, Ravindra
  INET: Ravindra.Basavaraja_at_T-Mobile.com

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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: 
  INET: Reginald.W.Bailey_at_jpmorgan.com

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Received on Wed May 28 2003 - 21:08:27 CDT

Original text of this message

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