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Which User Made That Change?
If you have spent any time tinkering about in the transaction log, you will of already come across a bit of a problem when trying to decide what was done and by whom – the ‘what part’ I have decoded in...
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SQL Internals Viewer
As Captain Oates once said, ‘I am just going outside and may be some time’ – feels like quite a while since I had to time to see down and write something. I had a bit of time to take a look at the SQL...
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Interval Partitioning in SQL Server 2008
Another one of those features in Oracle that we do not natively have in SQL Server is interval partitioning, where you can automatically have partitions generated based on an interval automatically...
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Blank Transactions
Busy time with a new addition to the household – sleep is clearly an optional parameter these days, but on to one of those oddities you might see in the transaction log. On many occasions you will see...
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Subtle change to ::fn_dblog in SQL 2008
Bizarrely given that transaction log decoding is not really viable as a technique beyond interest, it’s quite surprising how many people visit just to understand or learn how to do it. Either a lot of...
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SQL Server Hash Partitioning
It’s been a while since the last post, primarily due to changing jobs and now spending most of my time on Oracle – although it is always good to see the other side of the coin and see what it has to...
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Immutable Primary Key vs Immutable Clustered Key
It is often said that a primary key should be immutable, and this advice is echoed on a multitude of sites some of which strengthen it to a ‘law’ - but we know with databases that absolutes are rare...
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SQL Immersion Event – Dublin 2010
I attended the SQL Immersion event last year in Dublin and can honestly say that it was the best training course I have ever attended. The level of detail is phenomenal and the interaction with Paul...
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Query Parameterization and Wildcard Searches
Time flies when you’re busy, and it has been far too long since I last posted. To business however, and I noticed a problem in query parameterization the other day which does not make much sense at...
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Locating Table Scans Within the Query Cache
Some time back, Pinal Dave published a blog entry with an example of an XML script that used XQuery to examine the query cache – the script in itself is a very useful example of using XQuery against...
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Decoding a Simple Update Statement Within the Transaction Log
After decoding the delete statement within the transaction log, I thought I would tackle another statement – an update statement, although I am attempting the simple version of the update which is only...
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Why Are Date Tricks in SQL 2005 a Problem in Waiting?
One of the long time annoyances about the Date functions in SQL is that a number of them do not function as developer would wish, the prime example I’m going to focus on is the DateDiff function. The...
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Case Sensitivity in the Query Plan Cache
A surprising facet of the query plan cache is that it matches ad-hoc queries not only on their text, but the case of the query text must exactly match as well. This is documented quite clearly on MSDN...
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Dynamic Partitioning : What objects are using a Partition Schema? (SQL...
As part of the look at dynamic partitioning one of the first problems I have come across is finding what objects are currently placing data within a partition schema, this can be both tables as well as...
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Dynamic Partitioning : Wishlist
Whilst I consider dynamic partitioning something that really doesn’t serve a valid purpose that I can find yet, I decided to use it as an exercise to program a basic form of it within T-SQL over the...
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Is Dynamic Partitioning in SQL Server Possible?
I often see people asking whether dynamic table partitioning exists in SQL Server, or they provide a scenario that would effectively be asking the same question. So let’s get the easy answer out now –...
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How Can You Tell if a Database is in Pseudo Full/Bulk Logged Mode?
I was asked on Friday, “how do you tell if a database logging mode is reporting bulk or full, but it is still in simple?” – as mentioned before, a database is not in really full / bulk logged unless a...
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Rolling a Partition Forward – Part 2
The first part of this topic provided a mini-guide to loading data into a partitioned table and a few helpful DMV based statements that can help you automate the process. The unloading of the data...
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Rolling a Partition Forward – Part 1
I have covered how to layout a partitioned table across filegroups previously, but have not gone through the steps of rolling a partitioned window – it sounds a simple process but with all the file...
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How Can You Spot the Procedure Cache Being Flooded?
This comes from a question I had a couple of days ago – the SQL Server: Buffer Manager : Page Life Expectancy provides a performance counter that indicates the current lifetime of a page within memory....
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