Is there any specific enhancements in SQL Server 2012 for Data Compression Feature?

Last time I checked SQL Server 2008 R2 introduced support for Unicode characters so columns with NCHAR data types (excepts CLOBS and BLOBS) can now take advantage of compression technology in SQL Server.

  • "SQL 2008 R2 introduced support for Unicode characters" -- what?
    – Jon Seigel
    Jan 2 '14 at 19:27
  • 2
    @JonSeigel Not sure if you were just pointing out that it is clumsily phrased but clearly talking about technet.microsoft.com/en-us/library/ee240835.aspx Jan 2 '14 at 19:41
  • @Martin: I thought the statement meant that n[var]char columns could not be compressed in 2008, which didn't make sense. So 2008 R2 added additional compression on these column types, correct? I was unaware of that.
    – Jon Seigel
    Jan 2 '14 at 19:50
  • @JonSeigel Yes. Also normal row compression doesn't do anything to nvarchar/varchar but the unicode compression will apply there. Jan 2 '14 at 20:48
  • @JonSeigel -- Noted I should have phrased little better. Jan 3 '14 at 1:16

There were under-the-covers performance enhancements (nothing concrete, see for example this book excerpt. Otherwise, no, 2008 R2 compression and 2012 compression are functionally equivalent.

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