Tsql how to compare only date part?

Hi, I want to select from a table where the datetime column's date part equals to yesterday's date look something like this
      SELECT emailAddress from dbo.Patients
      where DateCreated = DateTime.Today - 1
need help with the where condition code.  Thank you.
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Patrick MatthewsCommented:
SELECT emailAddress from dbo.Patients
      where DateCreated >= DATEADD(d, -1, CONVERT(datetime, CONVERT(varchar, GETDATE(), 102)))
AND DateCreated < CONVERT(datetime, CONVERT(varchar, GETDATE(), 102))

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SELECT emailAddress
  FROM dbo.Patients
WHERE DateDiff( 'dd', DateCreated, GetDate() - 1) = 1

lapuccaAuthor Commented:
Thank you.
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