Problem Note 70497: A PROC SQL GROUP BY clause might return incorrect results and "The query requires remerging summary statistics back with the original data"
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An SQL procedure GROUP BY clause might produce incorrect results. In this scenario, the SAS® log shows a message similar to the following:
NOTE: The query requires remerging summary statistics back with the original data.
An example SQL query that might trigger the issue is one that groups on a calculated column reference such as height+weight:
proc sql ;
select height+weight as groupedVar, sum(height) as result
from sashelp.class
group by height+weight ;
quit ;
select height+weight as groupedVar, sum(height) as result
from sashelp.class
group by height+weight ;
quit ;
The expected result of this query is 18 rows, but it might result in 19 rows.
Workarounds include the following:
- Use column numbers in the GROUP BY clause. Here is an example: group by 1
- Use column alias' in the GROUP BY clause. Here is an example: group by groupedVar
See also SAS KB0036191, "Remerging SUMMARY statistics note using PROC SQL."
Click the Hot Fix tab in this note to access the hot fix for this issue.
Operating System and Release Information
| Product Family | Product | System | Product Release | SAS Release | ||
| Reported | Fixed* | Reported | Fixed* | |||
| SAS System | Base SAS | z/OS | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 |
| z/OS 64-bit | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft® Windows® for x64 | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows 8 Enterprise 32-bit | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows 8 Enterprise x64 | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows 8 Pro 32-bit | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows 8 Pro x64 | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows 8.1 Enterprise 32-bit | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows 8.1 Enterprise x64 | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows 8.1 Pro 32-bit | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows 8.1 Pro x64 | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows 10 | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows Server 2008 | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows Server 2008 R2 | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows Server 2008 for x64 | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows Server 2012 Datacenter | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows Server 2012 R2 Datacenter | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows Server 2012 R2 Std | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows Server 2012 Std | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows Server 2016 | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Microsoft Windows Server 2019 | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Windows 7 Enterprise 32 bit | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Windows 7 Enterprise x64 | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Windows 7 Home Premium 32 bit | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Windows 7 Home Premium x64 | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Windows 7 Professional 32 bit | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Windows 7 Professional x64 | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Windows 7 Ultimate 32 bit | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Windows 7 Ultimate x64 | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| 64-bit Enabled AIX | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| 64-bit Enabled Solaris | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| HP-UX IPF | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Linux for x64 | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
| Solaris for x64 | 9.4_M6 | 9.4_M8 | 9.4 TS1M6 | 9.4 TS1M8 | ||
A fix for this issue for Base SAS 9.4_M7 is available at:
https://tshf.sas.com/techsup/download/hotfix/HF2/I9R.html#70497A fix for this issue for Base SAS 9.4_M6 is available at:
https://tshf.sas.com/techsup/download/hotfix/HF2/D9T.html#70497
A PROC SQL GROUP BY clause might result in a data integrity issue when using original column names in the GROUP BY clause.
| Type: | Problem Note |
| Priority: | high |
| Topic: | SAS Reference ==> SQL |
| Date Modified: | 2024-04-04 14:00:41 |
| Date Created: | 2023-11-08 10:58:26 |