Delete old records

I have a column in my sqlite table which is string and has the following format

2011-09-06 18:34:55.863414

You can see that it identifies date and time. I'd like to construct a query that will delete all records that are ol开发者_如何学编程der than certain date and time. Is this possible?

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Since your date is already in the best format (largest time-period values to smallest)

DELETE FROM myTable
WHERE myDateField < '2011-09-06 18:34:55.863414'

BTW -- dates are strings in sqllite, AFAIK (which is why the format matters -- biggest values to smallest, so it works alphabetically too). IF you want to treat them as dates, you can use functions. Some good examples here: http://sqlite.org/lang_datefunc.html

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DELETE FROM tablename WHERE columnname < '2011-09-06 18:34:55.863414'

See: http://www.sqlite.org/lang_datefunc.html