I attended session of Pinal Dave and Vinod Kumar on SQL Misconceptions. Few of points from that session is as following

  1. SET ROWCOUNT and TOP and OrderBy is not same.
  2. Set RowCount , Top and OrdetBy gives different execution plan
  3. Misconception is Cluster Index gives the result out in Order. It sort and gives result
  4. Seems due to parallelism Cluster Index does not gives result in order
  5. Cluster Index assure u sorted result only if you are explicitly using order by in the query
  6. Precision of small DateTime 31 sec rounded to next minute and 29 sec gets truncated to orevious minute
  7. As of textbook cluster index physically store the data.
  8. Cluster Index does not store in physical order
  9. Go 10 will run 10 times
  10. In simple recovery model your transaction log is as big as longest transaction run in the system.


I hope this quick post is useful. Thanks for reading.


7 thoughts on “Some Important Points from “SQL Misconceptions” Session from Pinal Dave and Vinod Kumar

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s