Order By Grouping_Id() error

Question

The question is coming from that thread of russian forum.
SQL> with tab1 as
  2  (select 'CompanyA' CompanyName, 100 Sales from dual
  3  union all
  4  select 'CompanyA' CompanyName, 200 Sales from dual
  5  union all
  6  select 'CompanyB' CompanyName, 300 Sales from dual
  7  )
  8  select grouping_id(CompanyName),
  9         decode(grouping_id(CompanyName), 0, CompanyName, 'CompanyAB') CompanyName,
10         decode(grouping_id(CompanyName), 0, sum(sales),
11                sum(CASE WHEN companyname IN ('CompanyA', 'CompanyB')
12                         THEN sales
13                    END)) sales
14    from tab1
15   group by grouping sets((),(CompanyName))
16   order by 1 desc, CompanyName
17  /
GROUPING_ID(COMPANYNAME) COMPANYNAME      SALES
                       1 CompanyAB          600
                       0 CompanyA           300
                       0 CompanyB           300
SQL>
SQL> with tab1 as
  2  (select 'CompanyA' CompanyName, 100 Sales from dual
  3  union all
  4  select 'CompanyA' CompanyName, 200 Sales from dual
  5  union all
  6  select 'CompanyB' CompanyName, 300 Sales from dual
  7  )
  8  select grouping_id(CompanyName) gr_id,
  9         decode(grouping_id(CompanyName), 0, CompanyName, 'CompanyAB') CompanyName,
10         decode(grouping_id(CompanyName), 0, sum(sales),
11                sum(CASE WHEN companyname IN ('CompanyA', 'CompanyB')
12                         THEN sales
13                    END)) sales
14    from tab1
15   group by grouping sets((),(CompanyName))
16   order by gr_id desc, CompanyName
17  /
     GR_ID COMPANYNAME      SALES
         1 CompanyAB          600
         0 CompanyA           300
         0 CompanyB           300
SQL>
SQL> with tab1 as
  2  (select 'CompanyA' CompanyName, 100 Sales from dual
  3  union all
  4  select 'CompanyA' CompanyName, 200 Sales from dual
  5  union all
  6  select 'CompanyB' CompanyName, 300 Sales from dual
  7  )
  8  select grouping_id(CompanyName) gr_id,
  9         decode(grouping_id(CompanyName), 0, CompanyName, 'CompanyAB') CompanyName,
10         decode(grouping_id(CompanyName), 0, sum(sales),
11                sum(CASE WHEN companyname IN ('CompanyA', 'CompanyB')
12                         THEN sales
13                    END)) sales
14    from tab1
15   group by grouping sets((),(CompanyName))
16   order by grouping_id(CompanyName) desc, CompanyName
17  /
with tab1 as
(select 'CompanyA' CompanyName, 100 Sales from dual
union all
select 'CompanyA' CompanyName, 200 Sales from dual
union all
select 'CompanyB' CompanyName, 300 Sales from dual
select grouping_id(CompanyName) gr_id,
       decode(grouping_id(CompanyName), 0, CompanyName, 'CompanyAB') CompanyName,
       decode(grouping_id(CompanyName), 0, sum(sales),
              sum(CASE WHEN companyname IN ('CompanyA', 'CompanyB')
                       THEN sales
                  END)) sales
  from tab1
group by grouping sets((),(CompanyName))
order by grouping_id(CompanyName) desc, CompanyName
ORA-00979: not a GROUP BY expression
SQL>Have anyone met smth like this?
PS
SQL> select * from v$version where rownum=1;
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod
SQL

Answer 1

Hi,
Change the query as given below:
WITH tab1 AS
(SELECT 'CompanyA' CompanyName, 100 SALES FROM dual
UNION ALL
SELECT 'CompanyA' CompanyName, 200 SALES FROM dual
UNION ALL
SELECT 'CompanyB' CompanyName, 300 SALES FROM dual
SELECT grouping_id(CompanyName) gr_id,
DECODE(grouping_id(CompanyName), 0, CompanyName, 'CompanyAB') Company_Name,
DECODE(grouping_id(CompanyName), 0, SUM(SALES),
SUM(CASE WHEN companyname IN ('CompanyA', 'CompanyB')
THEN SALES
END)) SALES
FROM tab1
GROUP BY GROUPING SETS((),(CompanyName))
ORDER BY grouping_id(CompanyName) DESC, CompanyName
Regards
K.Rajkumar