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WITH prg_tbl(filename) AS ( SELECT 'TRG_jira_creditentity_20220426.csv' FROM dual UNION ALL SELECT 'TRG_jira_CRL_Boni_20220426.csv' FROM dual ) SELECT REGEXP_REPLACE(filename,'^(.*_)([^.]*).*','\2') AS col1, REGEXP_REPLACE(filename,'[^_]+$') AS col2 FROM prg_tbl
COL1
COL2
20220426
TRG_jira_creditentity_
20220426
TRG_jira_CRL_Boni_