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How to create a unique index on a NULL column?
I am using SQL Server 2005. I want to constrain the values in a column to be unique, while allowing NULLS.
4 Answers
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Is HTML5 localStorage asynchronous?
...emented it async?
– Ryan Nigro
Jun 30 '17 at 12:57
36
my problem is that I set an auth token in l...
vs in Generics
...iance in generic interfaces was added to C# and VB.NET (in .NET 4 with VS 2010), this was a compile time error.
After .NET 4, IEnumerable<T> was marked covariant, and became IEnumerable<out T>. Since IEnumerable<out T> only uses the elements within it, and never adds/changes them...
What does git rev-parse do?
...
260
git rev-parse is an ancillary plumbing command primarily used for manipulation.
One common usag...
E731 do not assign a lambda expression, use a def
... |
edited Mar 4 at 17:50
answered Jul 29 '14 at 7:31
Gar...
Simple and fast method to compare images for similarity
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109
Can the screenshot or icon be transformed (scaled, rotated, skewed ...)? There are quite a few ...
What is the MySQL VARCHAR max size?
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300
Keep in mind that MySQL has a maximum row size limit
The internal representation of a MySQL...
What is scaffolding? Is it a term for a particular platform?
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answered Oct 24 '08 at 19:48
swilliamsswilliams
43.4k2323 gold badges9393 silver badges129129 bronze badges
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How is std::function implemented?
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80
The implementation of std::function can differ from one implementation to another, but the core ...
How to place two divs next to each other?
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Float one or both inner divs.
Floating one div:
#wrapper {
width: 500px;
border: 1px solid black;
overflow: hidden; /* will contain if #first is longer than #second */
}
#first {
width: 300px;
float:left; /* add this */
border: 1px solid red;
}
#second {
border: 1px s...