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Clustered vs Non-Clustered
...s. non-clustered index is that the clustered index determines the physical order of the rows in the database. In other words, applying the clustered index to PersonId means that the rows will be physically sorted by PersonId in the table, allowing an index search on this to go straight to the row (r...
LINQPad [extension] methods [closed]
... where d.Contains(".exe") || d.Contains(".dll")
orderby d
select d;
q.Dump();
This will dump all files with file extensions ".exe" or ".dll" contained in C:\windows\system32. The /s switch is used to recurse all subdirectories and /b is used for bare output format. N...
Common elements comparison between 2 lists
...at when I ended up on this page, it was important to preserve the original order of the elements for the post-filtered elements. This method loses the order, whereas the list comprehension method preserves the order. Important if anyone needs to consider this. Thanks.
– agft...
Inline instantiation of a constant List
... then IEnumerable<string> would probably be most appropriate. If the order matters and you want people to be able to access it by index, IList<T> may be appropriate. If you want to make the immutability apparent, declaring it as ReadOnlyCollection<T> could be handy - but inflexible...
How to fetch the row count for all tables in a SQL SERVER database [duplicate]
...) SELECT ''?'', COUNT(*) FROM ?'
SELECT table_name, row_count FROM #counts ORDER BY table_name, row_count DESC
DROP TABLE #counts
The output will be a list of tables and their row counts.
If you just want the total row count across the whole database, appending:
SELECT SUM(row_count) AS total_ro...
What is the purpose of setting a key in data.table?
...set a key (e.g. X[Y] ). As such, I wish to understand what a key does in order to properly set keys in my data tables.
2 ...
What's the difference setting Embed Interop Types true and false in Visual Studio?
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This option was introduced in order to remove the need to deploy very large PIAs (Primary Interop Assemblies) for interop.
It simply embeds the managed bridging code used that allows you to talk to unmanaged assemblies, but instead of embedding it all it ...
JOIN queries vs multiple queries
...ase. It depends on a lot of things. Jeff Atwood (founder of this site) actually wrote about this. For the most part, though, if you have the right indexes and you properly do your JOINs it is usually going to be faster to do 1 trip than several.
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How do I turn off Oracle password expiration?
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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Check to see if python script is running
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This works BEAUTIFULLY. It just has to be run as root in order to run on Ubuntu. +1
– Jimmy
Oct 31 '15 at 14:57
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