How to take where clause conditions from table column in oracle SQL or plsql

Question

How to take where clause conditions from table column in oracle plsql.

Eg data in table Condition 1.sourceSystemId = 'SN' 2.AND(coverageType='AD',amountType1='PREMIUM',premiumFrequency='REGULAR',yearOfPremium='1')

eg query: select * from xyz where rule='abc' and "sourceSystemId = 'SN'"

select * from xyz where rule='abc' AND(coverageType='AD',amountType1='PREMIUM',premiumFrequency='REGULAR',yearOfPremium='1')

Answer 1

Not entirely sure what you're asking here, but I would imagine that

select * from xyz where rule='abc' AND(coverageType='AD',amountType1='PREMIUM',premiumFrequency='REGULAR',yearOfPremium='1')

would become

select * from xyz 
where rule='abc' 
AND coverageType='AD' 
and amountType1='PREMIUM' 
and premiumFrequency='REGULAR' 
and yearOfPremium='1'

Answer 2

I suppose you want something like :

DECLARE 
  l_query  VARCHAR2(2000) := 'select * from xyz where rule=''abc''';
  l_result xyz%ROWTYPE;
  l_cursor SYS_REFCURSOR;
BEGIN 
  dbms_output.put_line(l_query);
  FOR clause IN (SELECT condition
                   FROM conditions)
  LOOP
    l_query := l_query||' AND '||clause.condition;
  END LOOP;
  
  OPEN l_cursor FOR l_query;
    LOOP
      FETCH l_cursor INTO l_result;
      EXIT WHEN l_cursor%NOTFOUND;
        ..
      -- your processing
    END LOOP;
  CLOSE l_cursor;
END;

Answer 3

Here is example of SQL solution. I used justt first and last condition but you can get them all...

WITH
    xyz As
        (
            Select 1 "ID", 'abc' "RULE", 'AD' "COVERAGETYPE", 'PREMIUM' "AMOUNTTYPE1", 'REGULAR' "PREMIUMFREQUENCY", '1' "YEAROFPREMIUM" From Dual
          UNION
            Select 2 "ID", 'abc' "RULE", 'BF' "COVERAGETYPE", 'ORDINARY' "AMOUNTTYPE1", 'EXTRA' "PREMIUMFREQUENCY", '2' "YEAROFPREMIUM" From Dual
          UNION
            Select 3 "ID", 'abc' "RULE", 'AD' "COVERAGETYPE", 'PREMIUM' "AMOUNTTYPE1", 'REGULAR' "PREMIUMFREQUENCY", '1' "YEAROFPREMIUM" From Dual
        ),
    conditions As
        (
            SELECT UPPER('coverageType=AD,amountType1=PREMIUM,premiumFrequency=REGULAR,yearOfPremium=1') "CND" From Dual
        )
SELECT
    x.ID, x.RULE, x.COVERAGETYPE, x.AMOUNTTYPE1, x.PREMIUMFREQUENCY, x.YEAROFPREMIUM
FROM
    xyz x 
INNER JOIN
    conditions c ON(1=1)
WHERE
    x.RULE = 'abc' And
    x.COVERAGETYPE =  CASE WHEN InStr(c.CND || ',', 'COVERAGETYPE=') = 0 THEN x.COVERAGETYPE
                      ELSE SubStr(SubStr(c.CND || ',', InStr(c.CND || ',', 'COVERAGETYPE=') + Length('COVERAGETYPE=')), 1, InStr(SubStr(c.CND || ',', InStr(c.CND || ',', 'COVERAGETYPE=') + Length('COVERAGETYPE=') + 1), ',')) END And
    x.YEAROFPREMIUM = CASE WHEN InStr(c.CND || ',', 'YEAROFPREMIUM=') = 0 THEN x.YEAROFPREMIUM
                      ELSE SubStr(SubStr(c.CND || ',', InStr(c.CND || ',', 'YEAROFPREMIUM=') + Length('YEAROFPREMIUM=')), 1, InStr(SubStr(c.CND || ',', InStr(c.CND || ',', 'YEAROFPREMIUM=') + Length('YEAROFPREMIUM=') + 1), ',')) END

Result:

    ID RULE COVERAGETYPE AMOUNTTYPE1 PREMIUMFREQUENCY YEAROFPREMIUM
     1 abc  AD           PREMIUM     REGULAR          1            
     3 abc  AD           PREMIUM     REGULAR          1