Updating hour part of datetime column

• webrunner

  SSC-Dedicated

  Points: 31989

  More actions

  February 12, 2007 at 3:40 pm

  #175075

  Hello,

  Is there a way to update only the time part of a datetime field? For example, changing

  02/12/2007 5:30 PM

  to

  02/12/2007 9:30 PM

  I'm thinking of a query such as

  UPDATE schedule

  SET HOUR(start_time) = 9

  WHERE HOUR(start_time) = 5

  AND class_id = 100

  In other words, even if the class meets for 15 different days at the same time each day, is there a way to change only the time part without worrying about whatever day it is?

  Thanks for any help. And let me know if I'm missing something painfully obvious.

  Sincerely,

  webrunner

  -------------------
  A SQL query walks into a bar and sees two tables. He walks up to them and asks, "Can I join you?"
  Ref.: http://tkyte.blogspot.com/2009/02/sql-joke.html

• Aaron Ingold

  SSCrazy Eights

  Points: 9070

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  February 12, 2007 at 4:41 pm

  #689327

  Use Dateadd...

  UPDATE schedule

  SET start_time = DATEADD(hh, 4, start_time)

  WHERE DATEPART(hh, start_time) = 5

  AND class_id = 100

• webrunner

  SSC-Dedicated

  Points: 31989

  More actions

  February 13, 2007 at 7:20 am

  #689444

  Thank you!

  webrunner

  -------------------
  A SQL query walks into a bar and sees two tables. He walks up to them and asks, "Can I join you?"
  Ref.: http://tkyte.blogspot.com/2009/02/sql-joke.html