Comments on: SQL SERVER – Interview Questions and Answers – Frequently Asked Questions – Day 7 of 31 http://blog.sqlauthority.com/2011/07/07/sql-server-interview-questions-and-answers-frequently-asked-questions-day-7-of-31/ Personal Notes of Pinal Dave Sat, 25 May 2013 01:31:40 +0000 hourly 1 http://wordpress.com/ By: Narendra Kumar http://blog.sqlauthority.com/2011/07/07/sql-server-interview-questions-and-answers-frequently-asked-questions-day-7-of-31/#comment-311299 Mon, 09 Jul 2012 07:24:05 +0000 http://blog.sqlauthority.com/?p=13305#comment-311299 SELECT A.SalesOrderID, A.OrderDate, SQ.Max_Foo, SQ.Max_Foo2 FROM A LEFT OUTER JOIN ( SELECT B.SalesOrderID, MAX(B.Foo) AS Max_Foo, MAX(B.Foo2) AS Max_Foo2 FROM B GROUP BY B.SalesOrderID ) AS SQ ON SQ.SalesOrderID = A.SalesOrderID

]]> By: Sourish Biswas http://blog.sqlauthority.com/2011/07/07/sql-server-interview-questions-and-answers-frequently-asked-questions-day-7-of-31/#comment-250453 Thu, 09 Feb 2012 14:21:20 +0000 http://blog.sqlauthority.com/?p=13305#comment-250453 Can you please provide me an example of ‘Multiple column sub-query’

]]> By: Vinay Awasthi http://blog.sqlauthority.com/2011/07/07/sql-server-interview-questions-and-answers-frequently-asked-questions-day-7-of-31/#comment-182660 Mon, 24 Oct 2011 05:31:34 +0000 http://blog.sqlauthority.com/?p=13305#comment-182660 Hi Pinal,
I just wanted to know that if there is any procedure made earlier with encryption so is there any way to decrypt it. I really require help from you…

Is anybody here who can help me out from this situation.

]]> By: Ryan http://blog.sqlauthority.com/2011/07/07/sql-server-interview-questions-and-answers-frequently-asked-questions-day-7-of-31/#comment-153167 Wed, 03 Aug 2011 13:02:34 +0000 http://blog.sqlauthority.com/?p=13305#comment-153167 Regarding UPDATE_STATISTICS, the way I’m reading it from the description, that the command “updates the indexes”. To be more clear, it doesn’t update the actual indexes like, for example, rebuilding an index does. Rather, it only updates the statistics on the target index, which is used by the query plan optimizer.

]]> By: madhivanan http://blog.sqlauthority.com/2011/07/07/sql-server-interview-questions-and-answers-frequently-asked-questions-day-7-of-31/#comment-149160 Mon, 18 Jul 2011 14:20:27 +0000 http://blog.sqlauthority.com/?p=13305#comment-149160 Here you go
http://blog.sqlauthority.com/2011/07/08/sql-server-interview-questions-and-answers-frequently-asked-questions-day-8-of-31/

]]> By: Chaitanya http://blog.sqlauthority.com/2011/07/07/sql-server-interview-questions-and-answers-frequently-asked-questions-day-7-of-31/#comment-148291 Thu, 14 Jul 2011 15:04:21 +0000 http://blog.sqlauthority.com/?p=13305#comment-148291 Thanks for your well efforts.. to help..

]]> By: Chaitanya http://blog.sqlauthority.com/2011/07/07/sql-server-interview-questions-and-answers-frequently-asked-questions-day-7-of-31/#comment-148290 Thu, 14 Jul 2011 15:03:15 +0000 http://blog.sqlauthority.com/?p=13305#comment-148290 Hi Sir, Iam not able to go Day 8 of 31? could you please provide the link..

]]> By: Dew Drop – July 7, 2011 | Alvin Ashcraft's Morning Dew http://blog.sqlauthority.com/2011/07/07/sql-server-interview-questions-and-answers-frequently-asked-questions-day-7-of-31/#comment-146637 Thu, 07 Jul 2011 11:24:35 +0000 http://blog.sqlauthority.com/?p=13305#comment-146637 [...] SQL SERVER – Interview Questions and Answers – Frequently Asked Questions – Day 7 of 31 (Pinal Dave) [...]

]]> By: SQL SERVER – Interview Questions and Answers – Frequently Asked Questions – Complete Downloadable List – Day 0 of 31 Journey to SQLAuthority http://blog.sqlauthority.com/2011/07/07/sql-server-interview-questions-and-answers-frequently-asked-questions-day-7-of-31/#comment-146600 Thu, 07 Jul 2011 08:44:52 +0000 http://blog.sqlauthority.com/?p=13305#comment-146600 [...] SQL SERVER – Interview Questions and Answers – Frequently Asked Questions – Day 7 of 31 [...]

]]> By: pinaldave http://blog.sqlauthority.com/2011/07/07/sql-server-interview-questions-and-answers-frequently-asked-questions-day-7-of-31/#comment-146598 Thu, 07 Jul 2011 08:33:43 +0000 http://blog.sqlauthority.com/?p=13305#comment-146598 David,

Absolutely agree with your point. It can contain ORDER BY when used with TOP.

It is not a small point but very good point, however there is always debate about why one need it. Keeping it on aside. I am updating the original blog post to refer to your comment.

Many thanks,
Pinal

]]> By: davidbridge http://blog.sqlauthority.com/2011/07/07/sql-server-interview-questions-and-answers-frequently-asked-questions-day-7-of-31/#comment-146597 Thu, 07 Jul 2011 08:29:37 +0000 http://blog.sqlauthority.com/?p=13305#comment-146597 “A sub-query cannot contain an ORDER BY clause.”

It can.

but you must include a top x. This is because the order of the sub query ressults in unimporatant to the parent query however if you only want to top 10 or top 10 percent of the sub query results based on a column in that subquery then you need the order by. Also applies to xml.

Its a small point but I thought it might be useful to someone.

Dave

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