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MySQL INNER JOIN select only one row from second table
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@Fluffeh you have a very nice answer Part 1 - Joins and Unions. :) bookmarked!
– John Woo
Sep 21 '12 at 7:50
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What is the most effective way for float and double comparison?
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In PHP, why does not show a parse error?
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What is the maximum possible length of a query string?
... a larger value. Of course, this does increase your exposure to denial of service attacks.
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How to check if all of the following items are in a list?
...readable, but it may be over-kill. Sets are particularly useful to compute union/intersection/differences between collections, but it may not be the best option in this situation ...
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Error: allowDefinition='MachineToApplication' beyond application level
I have downloaded the online project in ASP.Net. While running application I get an error
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Converting VS2012 Solution to VS2010
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Thanks for this tip! Works even for downgrading an ASP.NET web api project. In addition to adapting Format Version 12.00 to Format Version 11.00 in sln and adjusting TargetFrameworkVersion element in csproj from 4.5 > 4.0; I had to remove httpRuntime element in web.config ...
Could not load file or assembly 'System.Data.SQLite'
I've installed ELMAH 1.1 .Net 3.5 x64 in my ASP.NET project and now I'm getting this error (whenever I try to see any page):
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MySQL - SELECT WHERE field IN (subquery) - Extremely slow why?
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I wonder why the optimizer considers queries with unions correlated... Anyway, this trick worked like magic
– Brian Leishman
Oct 26 '17 at 16:00
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sql primary key and index
...ed in PRIMARY KEY, but allowed in UNIQUE index; and like in set operators (UNION, EXCEPT, INTERSECT), here NULL = NULL which means that you can have only one value as two NULLs are find as duplicates of each other;
only one PRIMARY KEY may exists per table while 999 unique indexes can be created
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