set analysis expression for sql query

[prem1234]

Can some help with equivalent set  analysis expression for below sql query.

SELECT COUNT (DISTINCT A.PARTY_INSURED_ID)

  FROM PD.BI_INS_STS A

WHERE     A.INSURANCE_TYPE_ID <> 5

       AND A.CONTRACT_STATUS = 1

       AND A.CONTRACT_ID IN (SELECT CONTRACT_ID

                               FROM BI_INS_SALARY_CHANGE

                              WHERE STATUS = 1)

       AND ((       TO_CHAR (A.CONTRACT_START_DATE, 'YYYYMM') <= 202111

                AND (TO_CHAR (NVL (A.RESIGNATION_DATE, SYSDATE) + 1,

                              'YYYYMM') >

                     202111)

             OR (    TO_CHAR (A.CONTRACT_START_DATE, 'YYYYMM') = 202111

                 AND (  TRUNC (A.CONTRACT_START_DATE, 'MONTH')

                      - TRUNC (A.CONTRACT_END_DATE, 'MONTH')) =

                     0)));

I have tried to generate the master calendar for start date and end date then final set expression is like this but  output is not matching with query

count({< ContractStartDateKey={"<= $(vFS_CY_Start)"}, InsuranceTypeID-={5}, CONTRACT_STATUS={1}, SAL_STATUS={1},
ResignationDateKey={"> $(vFS_CY_End)"} , MonthYear =,Year = , Month =>//} distinct InsuranceNumber)
+
<ContractStartDateKey={">= $(vFS_CY_Start) <= $(vFS_CY_End)"}, InsuranceTypeID-={5}, CONTRACT_STATUS={1}, SAL_STATUS={1}, DUMMY_CONTRACT_STATUS={1},MonthYear =,Year = , Month =
>} distinct InsuranceNumber)  

in the above   vFS_CY_Start = min(DateKey)

                        vFS_CY_End = max(DateKey) 

                         if(date(Monthstart(CONTRACT_END_DATE))-date(Monthstart(CONTRACT_START_DATE))=0,1,0) as DUMMY_CONTRACT_STATUS,