You will have to use Primary index something like below
create table TWM_SANDBOX.Tbl_frm_Query1 as
(
SELECT CAST (RP.REGIS_DATETM AS DATE), COUNT(DISTINCT RP.REGIS_PRSNA_ID)
FROM iCRM_LOAD.REGIS_PRSNA RP
INNER JOIN iCRM.MKTNG_PGM MP ON RP.MKTNG_PGM_NBR = MP.MKTNG_PGM_NBR
INNER JOIN iCRM.REGIS_PRSNA_EMAIL_ADDR RPE ON RP.REGIS_PRSNA_ID = RPE.REGIS_PRSNA_ID AND RP.MKTNG_PGM_NBR = RPE.MKTNG_PGM_NBR
WHERE RP.MKTNG_PGM_NBR IN (115) AND RPE.SUBSCRPTN_OPT_IND = 'I' AND RP.PRSNA_STATUS_CODE = 'AC'
AND RP.REGIS_DATETM BETWEEN (CURRENT_DATE -7) and CURRENT_DATE
on a.MATCHD_CNSMR_PRSNA_ID = b.MATCHD_CNSMR_PRSNA_ID
You will have to use Primary index something like below
create table TWM_SANDBOX.Tbl_frm_Query1 as
(
SELECT CAST (RP.REGIS_DATETM AS DATE), COUNT(DISTINCT RP.REGIS_PRSNA_ID)
FROM
iCRM_LOAD.REGIS_PRSNA RP
INNER JOIN
iCRM.MKTNG_PGM MP
ON RP.MKTNG_PGM_NBR = MP.MKTNG_PGM_NBR
INNER JOIN
iCRM.REGIS_PRSNA_EMAIL_ADDR RPE
ON RP.REGIS_PRSNA_ID = RPE.REGIS_PRSNA_ID
AND RP.MKTNG_PGM_NBR = RPE.MKTNG_PGM_NBR
WHERE
RP.MKTNG_PGM_NBR IN (115)
AND RPE.SUBSCRPTN_OPT_IND = 'I'
AND RP.PRSNA_STATUS_CODE = 'AC'
AND RP.REGIS_DATETM BETWEEN (CURRENT_DATE -7) and CURRENT_DATE
on a.MATCHD_CNSMR_PRSNA_ID = b.MATCHD_CNSMR_PRSNA_ID
) With data primary index ( Columns) ;
or NO PRIMARY INDEX
HTH
Thanks
Abhijit