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Convert Char To Number

Angus123Oct 26 2021

Hi
I have a column which is a CHAR(40).
It contains data like 20210930 or data like 2021-08-11 00:00:00.000 +02:00.
I want to convert to a number like 20210930 or 20210811
This works
SELECT TO_NUMBER(TO_CHAR(TO_DATE('20210930','YYYYMMDD'), 'YYYYMMDD')) FROM dual;
How do I convert it to a number like 20210811
I have tried
SELECT TO_NUMBER(TO_CHAR(TO_DATE('2021-08-11 00:00:00.000 +02:00','YYYYMMDD'), 'YYYYMMDD')) FROM dual;
and several variations but always seem to get an error
Ora-01843 Not a valid month
Regards
Gus
This post has been answered by Frank Kulash on Oct 26 2021
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Added on Oct 26 2021
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