Before I describe this, let me thank Lynn Pettis over at SQL Server Central for coming up with the answer. This morning a developer walked up and asked me what would happen if he ran a query that looked like this: SELECT 1.SomeString I said that he'd get an error. No, he says, try it. So I try it and I get this: Somestring 1 Try it yourself. It works just fine. I'd never seen that before and didn't have a clue what it was. Thinking that Microsoft had supplied some new short hand to define aliases I ran this: SELECT 'dude'.dudette Which resulted in the error: Â Msg 258, Level 15, State 1, Line 1 Cannot call methods on varchar. Â Which is what I would have expected. I…
Thanks SQLBatman. It's not like I need to do work or something. Who has been a great leader in your career and what has made them a great leader? First, I need to define what I understand a leader to be and then I'll see if I have any great ones on the list. There are a lot of ways to define what a leader is. You could say simply the managers, team leads, CEO's and CIO's that you've worked for or with are leaders. But I don't see that. I think of a leader and I see Henry V and the St. Crispin's day speech, "...And gentlemen in England now-a-bed shall think themselves accurs'd they were not here, and hold their manhoods cheap whiles any speaks that fought with…
My first book is finally in print. OK. I know. It sounds funny. But my first book was printed in only a limited print run from Red Gate, most of which they gave away at Tech Ed last year. Then they offered it for free in an electronic form. Very few people got a printed copy. Well, if you were waiting around for the dead tree version, it's here! Thanks again to Tony Davis & Brad McGehee for all the work they did. It just wouldn't have been possible without them.
Jamie Laflen and Barclay Hill have published an article in MSDN Magazine outlining the new features in in VSTS:DB GDR. The description of the intent and use of the server project is extremely enlightening. I wasn't aware of the master.dbschema files available for use within a project. Luckily I haven't needed them yet. Another thing I wasn't aware of, if you use the refactoring tools, say rename a table, not only does it save you a lot of typing, but the project will remember that the table was renamed and instead of dropping and recreating it in the next deployment, it will issue SP_RENAME. I'm spreading that word to my team right now. Another good point is that you can make a configuration to work only on your local machine…
Greg Larson posted a really nice query to find worst performing stored procedures in your system. He put in all kinds of attributes to make it customizable, changing the definition of "worst" to different measures,etc. Great query in general. In it he linked to sys.dm_exec_plan_attributes and got the db_id attribute. Duh! So instead of spelunking through the XML to retrieve the database name, I can pull the db_id and use the DB_NAME function. Cleans things up considerably. Thanks Greg. Here's the cleaned up code: WITH XMLNAMESPACES ('http://schemas.microsoft.com/sqlserver/2004/07/showplan' AS sp) SELECT DB_NAME(CAST(pa.value AS INT)) ,s.sql_handle ,s.total_elapsed_time ,s.last_execution_time ,s.execution_count ,s.total_logical_writes ,s.total_logical_reads ,s.min_elapsed_time ,s.max_elapsed_time --,s.query_hash ,p.query_plan ,p.query_plan.value(N'(sp:ShowPlanXML/sp:BatchSequence/sp:Batch/sp:Statements/sp:StmtSimple/sp:QueryPlan/sp:MissingIndexes/sp:MissingIndexGroup/sp:MissingIndex/@Table)[1]', 'NVARCHAR(256)') AS TableName ,p.query_plan.value(N'(/sp:ShowPlanXML/sp:BatchSequence/sp:Batch/sp:Statements/sp:StmtSimple/sp:QueryPlan/sp:MissingIndexes/sp:MissingIndexGroup/sp:MissingIndex/@Schema)[1]', 'NVARCHAR(256)') AS SchemaName ,p.query_plan.value(N'(/sp:ShowPlanXML/sp:BatchSequence/sp:Batch/sp:Statements/sp:StmtSimple/sp:QueryPlan/sp:MissingIndexes/sp:MissingIndexGroup/@Impact)[1]', 'DECIMAL(6,4)') AS ProjectedImpact ,ColumnGroup.value('./@Usage', 'NVARCHAR(256)') AS ColumnGroupUsage ,ColumnGroupColumn.value('./@Name', 'NVARCHAR(256)') AS ColumnName FROM (SELECT TOP 20 s.sql_handle ,s.plan_handle ,s.total_elapsed_time…
I got an invite to take part in a lab at the Microsoft Technology Center in Waltham. I took advantage of it. I'll use this post to describe the experience so that anyone else with the opportunity will know what to expect. [caption id="attachment_333" align="alignnone" width="450" caption="They knew I was coming"] [/caption] First, you recieve a very explicit set of pre-requisites. You need to install the SQL Server Upgrade Assistant, a tool that Microsoft licensed Scalability Experts to create for them. You have to run this against a small database, >25gb. The tool backups up all the databases from the server (so you need to put it on to a test box, rather than try to move an entire production system worth of databases). It then starts a trace that captures all the…
A question came up on SQL Server Central as to why or how Profiler could bring down the production server. I was aware of the fact that Profiler caused problems and that's why you should always use a server-side trace on production systems. Duh! Of course.... But why? I didn't have an answer. I just "knew" what everyone told me. So I set out to do some research. Initially I hit my favorite source of information on SQL Server (and it should be yours too) the Books Online. Here is what I was reading on the architecture of Profiler. Good, but not enough. I still want more information, so I've gone out a'wanderin' through the interwebs. First, Linchi Shea has this great set of tests comparing Profiler to server side…
I received my evaluation results this afternoon (thanks so much Marcella). I had about 35 people attend the session and 11 took the time to respond. Overall, the session seems to have been well received. I had one person ding me for finishing early. I did finish early, but then we actually went over time on the Q&A session, so I think it was a wash. For my first time presenting in this type of environment, I find this to be useful feedback. I can see where Andy Warren is coming from in suggesting some questions that would be specifically helpful to the speaker would be nice. The questions are primarily aimed at determining whether or not the topic will be useful next year and whether or not the speaker…
Gee, thanks TJay. I have apparently been tagged to take part in a quiz started by Chris Shaw. It's an experiment in learning where a series of people answer the same question, hopefully spreading some useful knowledge. The question: What are the largest challenges that you have faced in your career and how did you overcome those? This is tough. You could answer based purely on technical issues, what was my toughest technical challenge. You could talk about career issues, tough bosses, ignorant co-workers, incompetent subordinates, clueless clients. You could also talk about shifting jobs as companies fail or are mismanaged or you move. You could also talk about missed opportunities, when you faced the large scale challenges and didn't quite rise to the occasion. Anyway... My Answers) 1) My…
I'm working on the chapter on blocking in the new book. Explaining blocking of course means explaining locks. Prior to 2005, to understand locks, you went to sp_lock. Not anymore. Now you can query sys.dm_tran_locks. It's so much more sophisticated than the old system procedure. Best of all, the information within it is simply a view into the internal locking infrastructure, so you're not placing extra load or extra processing on the system to marshal this data. A simple query to get basic locking information would look like this:  SELECT tl.request_session_id            ,tl.resource_database_id            ,tl.resource_associated_entity_id            ,tl.resource_type            ,tl.resource_description            ,tl.request_mode            ,tl.request_status  FROM sys.dm_tran_locks tl That just outputs roughly the same information as sp_lock. Lots more detail, not available in sp_lock, is available if you need it. Things…