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What are the main performance differences between varchar and nvarchar SQL Server data types?
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size needed for tempdb
performance of triggers (for inserted and deleted tables that are stored in tempdb)
performance of row versioning (if using SNAPSHOT ISOLATION, since the version store is in tempdb)
ability to get new disk space when the CFO says that they just spent $1 million on a SAN last...
Pip install Matplotlib error with virtualenv
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On my debian (wheezy/unstable) system it was failing even with libfreetype6-dev installed. It turned out that I also needed pkg-config installed.
– Jon
Mar 5 '14 at 20:25
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Getting only Month and Year from SQL DATE
...NTH, 0, <dateField>), 0) AS [year_month_date_field]
FROM
<your_table>
This gets the number of whole months from a base date (0) and then adds them to that base date. Thus rounding Down to the month in which the date is in.
NOTE: In SQL Server 2008, You will still have the TIME att...
Accessing Object Memory Address
...s have different kinds of id, but the most general is just an index into a table of objects you've called id on, which is obviously not going to be a pointer. I'm not sure about IronPython, but I'd suspect it's more like Jython than like CPython in this regard. So, in most Python implementations, th...
Why do we need entity objects? [closed]
... terms of Customers, Orders and Items, not a technology like DataSets, DataTables and DataRows...cuz who knows how long those will be around.
I agree that there is always a certain amount of coupling, but I prefer that coupling to reach upwards rather than downwards. I can tweak the limbs and le...
What is Domain Driven Design?
... these requirements with considering the relationships between classes and tables and in fact their design were based on database tables relationships it is not old but it has some problems:
In big projects with complex requirements it is not useful although this is a great way of design for smal...
How to find out client ID of component for ajax update/render? Cannot find component with expression
The following code is inspired from PrimeFaces DataGrid + DataTable Tutorials and put into a <p:tab> of a <p:tabView> residing in a <p:layoutUnit> of a <p:layout> . Here is the inner part of the code (starting from p:tab component); the outer part is trivial.
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What is the difference between NTFS Junction Points and Symbolic Links?
...ts, but Junction Points most definitely are not Symbolic Links! Oh and the table is wrong on one count also. The target of a Junction Point must exist upon creation, but it may indeed be removed later on.
– 0xC0000022L
Oct 22 '18 at 11:50
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ASP.NET Identity DbContext confusion
...hy is Asp.Net Identity IdentityDbContext a Black-Box?
How can I change the table names when using Visual Studio 2013 AspNet Identity?
Merge MyDbContext with IdentityDbContext"
To answer to all of these questions we need to understand that IdentityDbContext is just a class inherited from DbContext.
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Select mySQL based only on month and year
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Your query won't scale because it needs to do a full table scan unless there is some optimization in MySQL that I'm not aware of.
– aefxx
Feb 1 '12 at 23:20
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