Trouble is I need to import dates from Interbase that have the integer format yyyymmdd. How would I convert that (at import) to the SQLite date format? I do the import via an ADO recordset and then move the data via SQLite inserts.
RBS -----Original Message----- From: John Stanton [mailto:[EMAIL PROTECTED] Sent: 03 December 2006 17:01 To: [email protected] Subject: Re: [sqlite] Dealing with dates in the format yyyymmdd Why not use the internal Sqlite date format. Then date processing is straight forward and you can use the conversion routines to present it in the various national and ISO formats. Sqlite uses a very correct date storage format based on an epoch way back in antiquity so that you can present it in any national format. Using the internal format date comparison is just a numeric compare, which is efficient. If you need any special date presentation you can add a custome function to Sqlite to achieve it from your SQL statement. RB Smissaert wrote: > Just thought of one reason why it I need something else in SQLite than > yyyymmdd in the date field and that is because I need date comparisons > between different tables. So, I need to do: is fieldA + x days > fieldB? > etc. > This will be difficult with the yyyymmdd format. I could of course update > all the date fields in a VBA loop, but that might be a bit slow. So, if > anybody has an idea how to convert integer yyyymmdd to the Excel date format > in SQLite I would be interested. > > RBS > > -----Original Message----- > From: RB Smissaert [mailto:[EMAIL PROTECTED] > Sent: 03 December 2006 15:37 > To: [email protected] > Subject: RE: [sqlite] Dealing with dates in the format yyyymmdd > > I think it is easier to do this in VBA and as the main work is done in a VBA > array it is quite fast as well. Not as elegant maybe as doing it in SQLite, > but it will do. > > RBS > > -----Original Message----- > From: Fred Williams [mailto:[EMAIL PROTECTED] > Sent: 03 December 2006 14:41 > To: [email protected] > Subject: RE: [sqlite] Dealing with dates in the format yyyymmdd > > Is there a reason you can use Excel's "Format Cells" to accomplish what > you wish? Enter a "Custom" format of "yyyy\mm\dd" in a cell and enter > "=today()" as a value in that cell. Have not fooled with Excel much > lately, but I think you can even format a spreadsheet programmatically. > > Fred > > >>-----Original Message----- >>From: RB Smissaert [mailto:[EMAIL PROTECTED] >>Sent: Sunday, December 03, 2006 8:21 AM >>To: [email protected] >>Subject: [sqlite] Dealing with dates in the format yyyymmdd >> >> >>When moving data from Interbase to SQLite I have to convert >>integer dates in >>the format yyyymmdd to Excel dates. These are integer numbers >>counting the >>days past 31 December 1899. With substr I can make it >>dd/mm/yyyy (I am in >>the UK and that is the normal way to format dates) but the >>problem is it >>will be displayed in Excel like mm/dd/yyyy if that would be a >>possible date. >>This is due to the US date format of Excel. >>So, would it be possible in SQLite to make a date format like this: >>dd/mmm/yyyy so that would be 03/dec/2006 >>This would prevent Excel from putting the month first. >>or alternatively make it the Excel integer date format so the >>above date >>would be: 39054 >> >>I could handle the date formatting in VBA, but I would like >>to do as much as >>possible in SQLite as it will be faster and it would keep the >>code neater. >>Thanks for any advice. >> >>RBS >> >> >> >> >>-------------------------------------------------------------- >>--------------- >>To unsubscribe, send email to [EMAIL PROTECTED] >>-------------------------------------------------------------- >>--------------- >> > > > > ---------------------------------------------------------------------------- > - > To unsubscribe, send email to [EMAIL PROTECTED] > ---------------------------------------------------------------------------- > - > > > > > ---------------------------------------------------------------------------- > - > To unsubscribe, send email to [EMAIL PROTECTED] > ---------------------------------------------------------------------------- > - > > > > > ---------------------------------------------------------------------------- - > To unsubscribe, send email to [EMAIL PROTECTED] > ---------------------------------------------------------------------------- - > ---------------------------------------------------------------------------- - To unsubscribe, send email to [EMAIL PROTECTED] ---------------------------------------------------------------------------- - ----------------------------------------------------------------------------- To unsubscribe, send email to [EMAIL PROTECTED] -----------------------------------------------------------------------------
