sql server - How to convert text column to datetime in SQL -


i have column that's text:

remarks (text, null)

a sample value "5/21/2013 9:45:48 am"

how convert datetime format this: "2013-05-21 09:45:48.000"

the reason conversion trying total number of hours between datetime column , date stamp in remarks column. thinking of this:

remarks (text, null) - date_sent (datetime, null)

to clear, columns represent datetime inquiry customer sent (date_sent) , last response made representative regarding inquiry (response), sample of date_sent having value of "2013-05-21 08:00:00.000" , response value of "5/21/2013 10:00:00 am", should value of 2.00 (2 hours). unfortunately, in database i'm working on, remarks text , date_sent datetime.

i'm kind of new sql, need on :( tia!

use convert style 101.

select convert(datetime, remarks, 101)

if column text need convert varchar before converting datetime

select convert(datetime, convert(varchar(30), remarks), 101)

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