• Skinning a cat innit:

    SELECT [DateOnly] = CAST(FLOOR(CAST(GETDATE() AS FLOAT)) AS DATETIME) -- CAST / FLOOR / CAST

    SELECT [DateOnly] = dateadd(dd,datediff(dd, 0, getdate()), 0) -- DATEADD / DATEDIFF

    SELECT [DateOnly] = CAST(CAST(GETDATE() AS INT) AS DATETIME) -- CAST / CAST

    SELECT [DateOnly] = CAST(CONVERT(CHAR(8), GETDATE(), 112) AS DATETIME) -- CAST / CONVERT

    “Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

    For fast, accurate and documented assistance in answering your questions, please read this article.
    Understanding and using APPLY, (I) and (II) Paul White
    Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden