Error in nested group function used with column name.
Hi Team,
If i used nested group function with column name its not working. Could you please any one suggest me.
How to use it.
Regards,
Venkat.
Please find Spool ........
SQL> select user_name,max(max(CNT)) from (select USER_NAME,count(*) CNT from v$open_cursor group by USER_NAME)
2 group by user_name,CNT;
select user_name,max(max(CNT)) from (select USER_NAME,count(*) CNT from v$open_cursor group by USER_NAME)
ERROR at line 1:
ORA-00937: not a single-group group function
SQL> select max(max(CNT)) from(select USER_NAME,count(*) CNT from v$open_cursor group by USER_NAME)
2 group by user_name;
MAX(MAX(CNT))
605
Venkat wrote:
Hi Sayan
Its giving output like below, but not given maximum CNT.
SQL> select user_name,max(CNT)from (select USER_NAME,count(*) CNT from v$open_cursor group by USER_NAME)
2 group by user_name;
USER_NAME MAX(CNT)
BANES_LERG 6
VENE_USER 8
USER3 339
DBUS 106
VEL_USER 37
SYS 597
6 rows selected.Check it - Re: Error in nested group function used with column name.
and previous post
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Hey everyone,
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ThanxHi,
DESC is not a good column name; you could get errors if the parser thinks it means DESCending. I used DESCRIPTION instead, below.
I think the best way is to do the SUM in a sub-query, lkike this:
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That's why you got the ORA-00937 error.
This second approach will only display one row of output, so If there is a tie for the item with the greatest total_quantity, only one description will be shown. The RANK method will show all items that had the highest total_quantity.
It looks like the delivery table plays no role in this problem, but it there's some reason for including it, you can join it tpo either query above.
Of course, unless you post test copies of your tables (CREATE TABLE and INSERT statements) I cn't test anything.
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Error converting data type varchar to numeric.Please follow basic Netiquette and post the DDL we need to answer this. Follow industry and ANSI/ISO standards in your data. You should follow ISO-11179 rules for naming data elements. You should follow ISO-8601 rules for displaying temporal data. We need
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--CELKO-- Books in Celko Series for Morgan-Kaufmann Publishing: Analytics and OLAP in SQL / Data and Databases: Concepts in Practice Data / Measurements and Standards in SQL SQL for Smarties / SQL Programming Style / SQL Puzzles and Answers / Thinking
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