CSV in a Column, Want to select one value at a time.

Question

Hello ,
Oracle Database 11g.
I have a procedure in which i have to compare some value from a table. The problem is that the value in the table is in CSV ( Coma Separated Value).... see below
select parameter_name,description from t_mes_configurable_parameter
where parameter_name='DC_LOG_LEVEL'
        Parameter_Name                          Description
     DC_LOG_LEVEL                               DC log level ,ERROR=0,SYSTEM=1,INFO=2,DEBUG=3
Now as you can see the description column has a CSV's. Now i want to get the values individually.
In some different procedure i have to compare this value one - by - one.
If DESCRIPTION = 'DC log level' or 'ERROR=0' ...... then
-- some query --
end if;
Can i right any select query in which it will return me this column value as single value separating  from ' , ' (coma). ???
Thanks in advance .

Answer 1

Something like this ?
SQL> set line 1500
SQL> WITH test as 
  2     (SELECT 'DC_LOG_LEVEL' col1,'DC log level ,ERROR=0,SYSTEM=1,INFO=2,DEBUG=3' col2 FROM dual UNION ALL
  3      SELECT 'EF_LOG_LEVEL' col1,'EF log level ,ERROR=0,SYSTEM=1,INFO=2,DEBUG=3' col2 FROM dual UNION ALL
  4      SELECT 'GH_LOG_LEVEL' col1,'GH log level ,ERROR=0,SYSTEM=1,INFO=2,DEBUG=3' col2 FROM dual
  5     ) 
  6  ----End of Test data Creation -----
  7  ---- Actual Query -----------------  
  8     SELECT DISTINCT col1,regexp_substr (col2, '[^,]+', 1, level) col2 
  9     FROM test 
10     CONNECT BY LEVEL <= LENGTH (REGEXP_REPLACE (col2, '[^,]+'))  + 1
11     ORDER BY 1;
COL1         COL2
DC_LOG_LEVEL DC log level
DC_LOG_LEVEL DEBUG=3
DC_LOG_LEVEL ERROR=0
DC_LOG_LEVEL INFO=2
DC_LOG_LEVEL SYSTEM=1
EF_LOG_LEVEL DEBUG=3
EF_LOG_LEVEL EF log level
EF_LOG_LEVEL ERROR=0
EF_LOG_LEVEL INFO=2
EF_LOG_LEVEL SYSTEM=1
GH_LOG_LEVEL DEBUG=3
COL1         COL2
GH_LOG_LEVEL ERROR=0
GH_LOG_LEVEL GH log level
GH_LOG_LEVEL INFO=2
GH_LOG_LEVEL SYSTEM=1
15 rows selected.
SQL> OR
SQL> WITH test as 
  2     (SELECT 'DC_LOG_LEVEL' col1,'DC log level ,ERROR=0,SYSTEM=1,INFO=2,DEBUG=3' col2 FROM dual UNION ALL
  3      SELECT 'EF_LOG_LEVEL' col1,'EF log level ,ERROR=4,SYSTEM=5,INFO=6,DEBUG=7' col2 FROM dual UNION ALL
  4      SELECT 'GH_LOG_LEVEL' col1,'GH log level ,ERROR=0,SYSTEM=1,INFO=2,DEBUG=3' col2 FROM dual
  5     ) 
  6  ----End of Test data Creation -----
  7  ---- Actual Query -----------------  
  8  SELECT col1,REGEXP_SUBSTR(col2,'[^=]+',1,1)col2,REGEXP_SUBSTR(col2,'[^=]$+',1,1) col3
  9    FROM (
10           SELECT DISTINCT col1,regexp_substr (col2, '[^,]+', 1, level) col2 
11           FROM test 
12           CONNECT BY LEVEL <= LENGTH (REGEXP_REPLACE (col2, '[^,]+'))  + 1
13         )
14     ORDER BY 1,3;
COL1         COL2
COL3
DC_LOG_LEVEL DC log level
DC_LOG_LEVEL ERROR
0
DC_LOG_LEVEL SYSTEM
1
COL1         COL2
COL3
DC_LOG_LEVEL INFO
2
DC_LOG_LEVEL DEBUG
3
EF_LOG_LEVEL EF log level
COL1         COL2
COL3
EF_LOG_LEVEL ERROR
4
EF_LOG_LEVEL SYSTEM
5
EF_LOG_LEVEL INFO
6
COL1         COL2
COL3
EF_LOG_LEVEL DEBUG
7
GH_LOG_LEVEL GH log level
GH_LOG_LEVEL ERROR
0
COL1         COL2
COL3
GH_LOG_LEVEL SYSTEM
1
GH_LOG_LEVEL INFO
2
GH_LOG_LEVEL DEBUG
3
15 rows selected.
SQL> Edited by: Saubhik on Dec 20, 2010 6:17 PM