Column having minimum value of two calculated columns

Hi All
Please help me out in the following scenario.
I have to get the data from two tables so whatever columns I need put it in the select statement but for two columns I have to do calculations and did assigned an alias name to those two calculated columns, lets say X & Y.
I have to show the data for column Z, the rule for this column is to take minimum value of columns X & Y.
I have to use purely a select statement and retrieve the data. Camnt do any changes or creating functions on database.
thnaks in advance.

@Sven
First thought is using minimum function and throwed me error and then realized that min function can be used on a column and then searched for function to find minimum of calculated columns, could n't find out.
Then thought of using case or if statement to find out the minimum, felt thats not a good idea and also thought of using nested sub query, could n't achieve the desired.
Actually I didnt know about the least function, now I
Anyway thnak you all.

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version details
SQL> SELECT *
2 FROM V$VERSION;
BANNER
Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production
PL/SQL Release 11.1.0.7.0 - Production
CORE    11.1.0.7.0      Production
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CA2001/11/0002          FA000008     BRWR_SHORT_NAME          Nandu               SHIJU
CA2001/11/0002          FA000008     sic_code          1234               456My approach
select      ca_id,fac_id,column_name,
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from
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          from
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                         lead(sic_code,1) over(partition by ca_id,fac_id) ld_sic,
                         lag(sic_code,1) over(partition by ca_id,fac_id) lg_sic,
                         ca_id,fac_id
                    from r_dummy
          where (ld_brwr != lg_brwr or ld_sic != lg_sic)
)2nd Approach :
=============
select      ca_id,fac_id,column_name,
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     decode(column_name,'BRWR_SHORT_NAME',ld_brwr,ld_sic) after_modification
from
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                    when ld_brwr != lg_brwr then
                    'sic_code'
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          ) column_name,ca_id,fac_id,lg_brwr,ld_brwr,ld_sic,lg_sic
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                    from     r_dummy
                    where     ca_ver_num = '2.00'
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Hi,
Thanks for posting the CREATE TABLE and INSERT statements; that really helps!
Here's one wa. Like your 2nd approach, this uses a self-join:
WITH     got_r_num     AS
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,       p.fac_id
,       p.column_name
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,       a.txt          AS after_modification
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sample_short.csv ‏2439 KB

Hi,
Thanks for remnding me. I forgt to attach the VI,
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Get the minimum value from a cursor

Hi,
i have a cursor that returns the following two columns in a stored procedure. now i want to find the minimum value of SORT NUMBER column .
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create or replace procedure get_min
as
cursor c1 is
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begin
for c1_rec in c1
select min(c1_rec.sort_number) into v_min ;
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GRP_NUMBER            SORT NUMBER
1001                           9978
1002                           9979
1003                           9946   thanks in advance.

OPTION1
I'm guessing your stored procedure loops through the cursor (goes record by record and does something), correct? If it loops through all records, then
1. first define variable which will hold minimum value e.g.
my_min_value number := 0;
2. then add this inside the loop (as you loop through all records, my_min_value will get assign the lowest value)
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OPTION2
if you don't loop through all records (maybe have a condition and stop looping), then you can always change the SQL and add the minimum value to the SQL, there are multiple ways to do this, this is one of them - I hope there is no typo - it's 8pm :-)
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from group_table
OPTION3
get rid of cursor, there are probably 5000 better choices :-)

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