Chirag (10/31/2008)
Thank you Gail. That explains things clearly. So would the same apply to BLOB data. Would BLOB data be brought into memory and then modified?
Exactly the same. The query processor can only operate on pages in memory. The query processor has no knowledge of the disks and no ability to interact with the disks. That's what the storage engine does.
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability