I have a timestamp column in a table that I need back as a date because the Microsoft OleDb provider for ASP.NET 1.1 does not support timestamps. So to experiment in TOAD, I try the following:
select to_date (to_char (SYSTIMESTAMP, 'YYYY-MON-DD HH24.MI.SS'), 'YYYY-MON-DD HH24.MI.SS') AS MY_DATE from DUAL;
All I get back in the date portion and no time value! It seems that this should work, but obviously I'm missing something. Any help on this is genuinely appreciated. TIA
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I.e. When you select a date in sql, by default it returns the date in the format dd-mon-yy, eventhough the time component is there it doesnt show. If you want to see the time also, you have to use the to_char function again to show the time. Try this query.
select to_char(to_date (to_char (SYSTIMESTAMP, 'YYYY-MON-DD HH24.MI.SS'), 'YYYY-MON-DD HH24.MI.SS') , 'YYYY-MON-DD HH24.MI.SS') AS MY_DATE from DUAL
/
now, I agree with sujith, just some more :
the query he suggested actually did the same job (to_char) twice, which is senseless, actually this would be sufficient:
select to_char (SYSTIMESTAMP, 'YYYY-MON-DD HH24.MI.SS')AS MY_DATE from DUAL
now, if you really wanted to get a datetime from the timestamp:
select to_date (to_char (SYSTIMESTAMP, 'YYYY-MON-DD HH24.MI.SS'), 'YYYY-MON-DD HH24.MI.SS') AS MY_DATE from DUAL
now, the date has indeed the time portion in it, but the "by default" the time is not displayed is actually controlled by the NLS parameters.
the server has default settings, which can be overriden on your session level (and by local environment variables)
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by: sujith80Posted on 2007-09-06 at 20:44:18ID: 19845276
The time component is already there. Its only that you are not displaying it.
If you want to see add a to_char around the select value and display it.