SQL Query using flag values

Question

Hi,
I am having following data in Oracle 9i
create table toto ( a number, flag varchar2(1));
insert into toto values (1, 'U');
insert into toto values (1, 'O');
insert into toto values (2, 'U');
insert into toto values (3, 'U');
insert into toto values (3, 'O');
insert into toto values (4, 'U');
insert into toto values (4, 'O');
insert into toto values (4, 'I');
insert into toto values (4, 'L');
insert into toto values (5, 'U');
insert into toto values (6, 'O');
insert into toto values (7, 'O');
insert into toto values (7, 'U');
insert into toto values (8, 'O');
insert into toto values (9, 'U');
insert into toto values (9, 'O');
insert into toto values (9, 'I');
insert into toto values (9, 'L');
insert into toto values (9, 'U');
insert into toto values (9, 'O');
insert into toto values (9, 'I');
insert into toto values (9, 'L');
insert into toto values (9, 'U');
insert into toto values (9, 'O');
insert into toto values (9, 'I');
insert into toto values (9, 'L');
I want where flag is 'U' or 'O' or 'U' and 'O' they should be mark as 'SAT' and those who are
having flag 'U' and 'O', and 'I' and 'L' should come as present
my output should be
1 SAT
2 SAT
3 SAT
4 PRESENT
5 SAT
6 SAT
7 SAT
8 SAT
9 PRESENT
pl show me how to do it
thanks
devesh

Answer 1

Hi, Devesh,
user10745179 wrote:
Hi,
I am having following data in Oracle 9i
create table toto ( a number, flag varchar2(1));
insert into toto values (1, 'U');
insert into toto values (1, 'O');
insert into toto values (2, 'U');
insert into toto values (3, 'U');
insert into toto values (3, 'O');
insert into toto values (4, 'U');
insert into toto values (4, 'O');
insert into toto values (4, 'I');
insert into toto values (4, 'L');
insert into toto values (5, 'U'); ...Thanks for posting the CREATE TABLE and insert statements; that's very helpful.
I want where flag is 'U' or 'O' or 'U' and 'O' they should be mark as 'SAT' and those who are
having flag 'U' and 'O', and 'I' and 'L' should come as present
my output should be
1 SAT
2 SAT
3 SAT
4 PRESENT
5 SAT ...It looks like you're using "having" to mean two different things.
Are you saying that, for a group (all the rows with the same value of a) to be called 'PRESENT' it must have all 4 values 'U', 'O', 'I' and 'L', but to be marked as SAT it only needs to have 1 of the values 'O' or 'U' (e.g., a=2 has only 'U')?
Here's one way:
SELECT       a
,       CASE
           WHEN  COUNT ( DISTINCT CASE
                          WHEN  flag  IN ('I', 'L', 'O', 'U')
                          THEN  flag
                         END
                 ) = 4
           THEN  'PRESENT'
           WHEN  COUNT ( DISTINCT CASE
                          WHEN  flag  IN ('O', 'U')
                          THEN  flag
                         END
                 ) >= 1
           THEN  'SAT'
       END               AS flag_summary
FROM       toto
GROUP BY  a
ORDER BY  a
;Are 'I'. 'L', 'O' and 'U' the only possible values of flag? What happens if a group has flags other than the 4 you mentioned?
Edited by: Frank Kulash on Dec 1, 2011 6:59 AM