Update duplicate records

Question

Hi All,
Here is table data.
COl1 Col2 R_Status
100 A
100 A
100 A
100 A
101 A
102 A
103 B
103 B
103 B
I need output like this
COl1 Col2 R_Status
100 A error
100 A error
100 A error
100 A error
101 A error
102 A error
103 B load
103 B load
103 B load
Error - should update based on col1, col2 in the above example A has 3 different values B has only one value, so the status should be Error for all the records with value A.
please provide the SQL query for this
Appreciate your help

Answer 1

ME_XE?with data as
  2  (
  3     select 100 as col1, 'A' as col2 from dual union all
  4     select 100 as col1, 'A' as col2 from dual union all
  5     select 100 as col1, 'A' as col2 from dual union all
  6     select 100 as col1, 'A' as col2 from dual union all
  7     select 101 as col1, 'A' as col2 from dual union all
  8     select 102 as col1, 'A' as col2 from dual union all
  9     select 103 as col1, 'B' as col2 from dual union all
10     select 103 as col1, 'B' as col2 from dual union all
11     select 103 as col1, 'B' as col2 from dual
12  )
13  select
14     col1,
15     col2,
16     case when count(distinct col1) over (partition by col2) > 1
17     then
18        'error'
19     else
20        'load'
21     end as col3
22  from data
23  order by col1, col2;
              COL1 COL COL3
               100 A   error
               100 A   error
               100 A   error
               100 A   error
               101 A   error
               102 A   error
               103 B   load
               103 B   load
               103 B   load
9 rows selected.
Elapsed: 00:00:01.03
ME_XE?
ME_XE?
ME_XE?select * from v$version;
BANNER
Oracle Database 10g Express Edition Release 10.2.0.1.0 - Product
PL/SQL Release 10.2.0.1.0 - Production
CORE    10.2.0.1.0      Production
TNS for Linux: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
5 rows selected.
Elapsed: 00:00:01.09