Convert to a date format

Hi,
I have a table with a date field that comes as varchar2(20byte) with a content like this:
20/Jan/2011
and I need it to be converted toa real date format e.g. 20.01.2011.
Please help,
Thanks
Walter

Hi, Walter,
user457173 wrote:
Hi,
I have a table with a date field that comes as varchar2(20byte) with a content like this:
20/Jan/2011
and I need it to be converted toa real date format e.g. 20.01.2011.'20/Jan/2011' is actually just as "real" as '20.01.2011'. Neither is a real DATE; both are strings.
Please help,
Thanks
WalterUse TO_DATE to convert a string into a DATE:
TO_DATE ( column_x
        , 'DD/Mon/YYYY'
        )Use TO_CHAR to display a DATE in a given format:
TO_CHAR ( d
        , 'DD.MM.YYYY'
        )d can be any DATE, including the DATE returned by the TO_DATE function, above.
I hope this answers your question.
If not, post a little sample data (CREATE TABLE and INSERT statements, relevant columns only), and the results you want from that data.
Explain, using specific examples, how you get those results from that data.
Always say what version of Oracle you're using.
Edited by: Frank Kulash on Oct 25, 2011 7:57 AM

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I've converted date formats many times, but for some reason I'm getting an invalid number error when trying to convert a varchar2 column. I've tried the to_char and to_date function and I get the same result. The column is a date and it is formatted as DD-MON-YYYY, but I want to change it to MM/DD/YYYY. My query is below:
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Hi,
housetiger77 wrote:
I've converted date formats many times, but for some reason I'm getting an invalid number error when trying to convert a varchar2 column. I've tried the to_char and to_date function and I get the same result. The column is a date and it is formatted as DD-MON-YYYY,If the column is a DATE, then it has the same format that all DATEs have, which is nothing like 'DD-MON-YYYY'. Formats like that only apply to strings.
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but I want to change it to MM/DD/YYYY. My query is below:
select to_date('fccpdate','MM/DD/YYYY')
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When I try to_char I get this:
Error starting at line 1 in command:
select TO_char('fccpdate', 'DD-MON-YYYY') from cc_class_scmast_v where fccpdate IS NOT NULL
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SQL Error: ORA-01722: invalid number
01722. 00000 - "invalid number"
*Cause:
*Action:
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1 row selected.It doesn't make sense to convert something that's already in a DATE format into a DATE format - in order to do that, oracle has to first change the date into a string, and it does that by using the nls_date_format parameter setting - if you're working with dates-in-strings that are in a different format, then all sorts of problems arise, as you have found out!

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04     2     09/04/2008     16/04/2008
04     3     17/04/2008     23/04/2008
04     4     24/04/2008     30/04/2008
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Convert to a date format

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