Timestamp stored as Varchar, query range

I have a SQL server table written to by ForceTen LMS; I did not create the table and cannot modify it or the code that writes to it.
In it are stored some timestamps. However, they are stored as Varchar in this format:
Starttime               EndTime
2005-10-12-21.40.37	    2005-10-19-16.44.05
2005-10-12-21.40.57	    2005-10-21-12.48.35

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How can I query a range for the EndTime?
SELECT * FROM Table WHERE EndTime >= :param1 AND EndTime < :param2

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LVL 27
Eddie ShipmanAll-around developerAsked:
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dsackerContract ERP Admin/ConsultantCommented:
Try this:
FROM    Table
WHERE   CONVERT(datetime, REPLACE(STUFF(StartTime, 11, 1, ' '), '.', ':')) >= :param1
AND     CONVERT(datetime, REPLACE(STUFF(EndTime, 11, 1, ' '), '.', ':')) < :param2

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Explanation: SQL likes a datetime format of yyyy-mm-dd hh:mm:ss.

The STUFF command "stuffs" a space in position 11 where the hypen (-) is.
The REPLACE command "replaces" those periods with colons.

At that point the fields can be CONVERTed to datetime types.

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Eddie ShipmanAll-around developerAuthor Commented:
Perfect...I wish they had an easier way to do this, like in MySQL...
PortletPaulEE Topic AdvisorCommented:
>>" SQL likes a datetime format of yyyy-mm-dd hh:mm:ss."

If you specify the style number 120 then you can depend on yyyy-mm-dd hh:mm:ss being used

FROM    Table
WHERE   CONVERT(datetime, REPLACE(STUFF(StartTime, 11, 1, ' '), '.', ':') ,120 ) >= :param1
AND     CONVERT(datetime, REPLACE(STUFF(EndTime, 11, 1, ' '), '.', ':') ,120 ) < :param2

SQL Server Date Styles (formats) using CONVERT()
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Microsoft SQL Server

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