August 4, 2015 at 5:17 pm
Jeff Moden (8/4/2015)
I think before we get into interview questions, it would be much better to define what a DBA/Developer needs to be, know, and do.I remember a post that someone made several years ago that pretty well had it down pat. I was going to add it to my briefcase but I apparently forgot. IIRC, the post was about job descriptions and what was posted in one of the posts on that thread was just brilliant. I wish I could find it again.
Would it be a post in this article?
http://www.sqlservercentral.com/articles/Career/72939/
Jason...AKA CirqueDeSQLeil
_______________________________________________
I have given a name to my pain...MCM SQL Server, MVP
SQL RNNR
Posting Performance Based Questions - Gail Shaw[/url]
Learn Extended Events
August 4, 2015 at 9:27 pm
SQLRNNR (8/4/2015)
WayneS (8/4/2015)
Sean Lange (8/4/2015)
yb751 (8/4/2015)
Raise your hands if you like Entity Framework...then I'll know who to shoot!Sorry just needed two seconds to vent. :crazy:
I'm sure like anything else it can be fine when implemented properly. Problem is the devs here had carte blanche long before I showed up and I'm feeling the pain. Troubleshooting performance problems with those statements are a HUGE pain!
</rant>
I know just enough about EF to totally despise it. One of our previous developers brought a "query" to my desk once that EF wrote for them. They used profiler to get the actual query and confirmed it did in fact return the correct results. He knew I am pretty savvy at finding ways of scraping performance out of queries so he asked me to look at it and see if I could "work my magic" on it. This thing was nearly 800 lines and had over 100 subqueries (many of them nested 7-10 layers deep).
I told him that I would be happy to fix it for him. I hit Ctrl - N and asked him what the query needs to return. 😛
That's the best way to deal with ORM. Just saying...
Second that notion.
To bastardize a great quote: "ORMs are the root of all evil."
Then there's this: What ORMs have taught me: just learn SQL
My thought question: Have you ever been told that your query runs too fast?
My advice:
INDEXing a poor-performing query is like putting sugar on cat food. Yeah, it probably tastes better but are you sure you want to eat it?
The path of least resistance can be a slippery slope. Take care that fixing your fixes of fixes doesn't snowball and end up costing you more than fixing the root cause would have in the first place.
Need to UNPIVOT? Why not CROSS APPLY VALUES instead?[/url]
Since random numbers are too important to be left to chance, let's generate some![/url]
Learn to understand recursive CTEs by example.[/url]
[url url=http://www.sqlservercentral.com/articles/St
August 4, 2015 at 11:25 pm
SQLRNNR (8/4/2015)
Jeff Moden (8/4/2015)
I think before we get into interview questions, it would be much better to define what a DBA/Developer needs to be, know, and do.I remember a post that someone made several years ago that pretty well had it down pat. I was going to add it to my briefcase but I apparently forgot. IIRC, the post was about job descriptions and what was posted in one of the posts on that thread was just brilliant. I wish I could find it again.
Would it be a post in this article?
THAT would be the one! Great discussion after a great article. Thanks for finding it, Jason!
For those that want to know, the exact post on that thread that I was looking for can be found here.
http://www.sqlservercentral.com/Forums/FindPost1456698.aspx
The article for that discussion thread is also awesome. It's a must read in my book and I'm glad that Jason re-found it for me.
--Jeff Moden
Change is inevitable... Change for the better is not.
August 5, 2015 at 2:59 am
I have been nominated again for Author of the Year at MSSQLTips.com. For some reason they already started the voting process, which runs until the end of the year.
You can vote here and karma will be with you if you vote for me as well 😀
https://www.mssqltips.com/mssqltips-author-voting.asp
Need an answer? No, you need a question
My blog at https://sqlkover.com.
MCSE Business Intelligence - Microsoft Data Platform MVP
August 5, 2015 at 3:43 am
Koen Verbeeck (8/5/2015)
I have been nominated again for Author of the Year at MSSQLTips.com. For some reason they already started the voting process, which runs until the end of the year.You can vote here and karma will be with you if you vote for me as well 😀
sounds good to me.
August 5, 2015 at 4:29 am
Koen Verbeeck (8/5/2015)
I have been nominated again for Author of the Year at MSSQLTips.com. For some reason they already started the voting process, which runs until the end of the year.You can vote here and karma will be with you if you vote for me as well 😀
Voted. Good luck.
"The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood"
- Theodore Roosevelt
Author of:
SQL Server Execution Plans
SQL Server Query Performance Tuning
August 5, 2015 at 5:00 am
Grant Fritchey (8/5/2015)
Koen Verbeeck (8/5/2015)
I have been nominated again for Author of the Year at MSSQLTips.com. For some reason they already started the voting process, which runs until the end of the year.You can vote here and karma will be with you if you vote for me as well 😀
Voted. Good luck.
Thanks!
Need an answer? No, you need a question
My blog at https://sqlkover.com.
MCSE Business Intelligence - Microsoft Data Platform MVP
August 5, 2015 at 5:21 am
Koen Verbeeck (8/5/2015)
I have been nominated again for Author of the Year at MSSQLTips.com. For some reason they already started the voting process, which runs until the end of the year.You can vote here and karma will be with you if you vote for me as well 😀
+1
😎
August 5, 2015 at 5:33 am
I am shattered, y'all. Just shattered.
I'll be in the back of the Tent in the Desert, crying my eyes out for a while.
August 5, 2015 at 5:36 am
Luis Cazares (8/4/2015)
Lynn Pettis (8/4/2015)
SQLRNNR (8/4/2015)
Lynn Pettis (8/4/2015)
SQLRNNR (8/4/2015)
Steve Jones - SSC Editor (8/4/2015)
Since we're all piling on the behavior of others, I was wondering.Is there value in getting the questions/knowledge that people lack in interviews published? Not really as a cheat sheet, but as a way to surface that knowledge that interviewers think is important. I suspect it would be a long list, so it's unlikely that anyone could just memorize all the answers.
However even if they did, I think they'd be learning.
I was actually thinking to try and collect a list of things from interviewers and put a session together. I meet so many 101 people at events, they might benefit from a session that guides them towards learning a few things first.
You could take a look at this stuff from Wayne.
http://blog.waynesheffield.com/wayne/archive/2012/06/interview-questions/
Okay, I'm hoping he changed is lab after posting that blog. The lab as described would be the easy part. Now, some of the questions he mentioned in the in-person interview, there are a few I may have some difficulty with answering. Guess I need to do some research!
You'd be surprised how many can't survive the lab.
From the description in his blog, it just seems easy to me. Of course I am not in the pressure cooker actually working the lab during an interview process.
I wouldn't mind giving it a shot just to see how I'd do.
The lab might be very easy for the threadizens. I wonder if it extra points would be achieved for going directly to Wayne's article on creating a comma delimited list.
I have to admit that I wouldn't be able to answer some questions.
There are some I wouldn't be able to answer as well. Then again, how a candidate reacts to not knowing all the answers to everything might be a part of the interview. Let's face it - I don't think anyone knows everything there is to know about SQL Server.
August 5, 2015 at 5:41 am
Koen Verbeeck (8/5/2015)
I have been nominated again for Author of the Year at MSSQLTips.com. For some reason they already started the voting process, which runs until the end of the year.You can vote here and karma will be with you if you vote for me as well 😀
Voted. Good luck, Koen.
August 5, 2015 at 5:49 am
Brandie Tarvin (8/5/2015)
I am shattered, y'all. Just shattered.I'll be in the back of the Tent in the Desert, crying my eyes out for a while.
c'est la vie
😎
August 5, 2015 at 7:14 am
dwain.c (8/4/2015)
SQLRNNR (8/4/2015)
WayneS (8/4/2015)
Sean Lange (8/4/2015)
yb751 (8/4/2015)
Raise your hands if you like Entity Framework...then I'll know who to shoot!Sorry just needed two seconds to vent. :crazy:
I'm sure like anything else it can be fine when implemented properly. Problem is the devs here had carte blanche long before I showed up and I'm feeling the pain. Troubleshooting performance problems with those statements are a HUGE pain!
</rant>
I know just enough about EF to totally despise it. One of our previous developers brought a "query" to my desk once that EF wrote for them. They used profiler to get the actual query and confirmed it did in fact return the correct results. He knew I am pretty savvy at finding ways of scraping performance out of queries so he asked me to look at it and see if I could "work my magic" on it. This thing was nearly 800 lines and had over 100 subqueries (many of them nested 7-10 layers deep).
I told him that I would be happy to fix it for him. I hit Ctrl - N and asked him what the query needs to return. 😛
That's the best way to deal with ORM. Just saying...
Second that notion.
To bastardize a great quote: "ORMs are the root of all evil."
Then there's this: What ORMs have taught me: just learn SQL
My favorite:
ORMs: The fastest way to a slow database.
Wayne
Microsoft Certified Master: SQL Server 2008
Author - SQL Server T-SQL Recipes
August 5, 2015 at 7:25 am
Lynn Pettis (8/4/2015)
SQLRNNR (8/4/2015)
Lynn Pettis (8/4/2015)
SQLRNNR (8/4/2015)
Steve Jones - SSC Editor (8/4/2015)
Since we're all piling on the behavior of others, I was wondering.Is there value in getting the questions/knowledge that people lack in interviews published? Not really as a cheat sheet, but as a way to surface that knowledge that interviewers think is important. I suspect it would be a long list, so it's unlikely that anyone could just memorize all the answers.
However even if they did, I think they'd be learning.
I was actually thinking to try and collect a list of things from interviewers and put a session together. I meet so many 101 people at events, they might benefit from a session that guides them towards learning a few things first.
You could take a look at this stuff from Wayne.
http://blog.waynesheffield.com/wayne/archive/2012/06/interview-questions/
Okay, I'm hoping he changed is lab after posting that blog. The lab as described would be the easy part. Now, some of the questions he mentioned in the in-person interview, there are a few I may have some difficulty with answering. Guess I need to do some research!
You'd be surprised how many can't survive the lab.
From the description in his blog, it just seems easy to me. Of course I am not in the pressure cooker actually working the lab during an interview process.
I wouldn't mind giving it a shot just to see how I'd do.
Like I mentioned in the blog, I'm looking for a set-based answer. 99% are a while loop.
And Lynn... I have a special lab, just for you. Want to take it?
Wayne
Microsoft Certified Master: SQL Server 2008
Author - SQL Server T-SQL Recipes
August 5, 2015 at 7:28 am
Eirikur Eiriksson (8/5/2015)
Brandie Tarvin (8/5/2015)
I am shattered, y'all. Just shattered.I'll be in the back of the Tent in the Desert, crying my eyes out for a while.
c'est la vie
😎
I read that it's only a marketing trick to promote their new TV show.
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