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Difference between partition key, composite key and clustering key in Cassandra?
... KEY((col1, col2), col10, col4))
You can perform query only by passing at least both col1 and col2, these are the 2 columns that define the partition key. The "general" rule to make query is you have to pass at least all partition key columns, then you can add optionally each clustering key in the ...
How to search for a part of a word with ElasticSearch
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@JimC I haven’t used ElasticSearch for at least 7 years, so I don’t know the current changes of the project.
– roka
May 11 at 4:45
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How to become an OpenCart guru? [closed]
...in the cart
$this->cart->hasProducts() - returns true if there is at least one item in the cart
$this->cart->hasStock() - returns false if there is at least one item in the cart that is out of stock
$this->cart->hasShipping() - returns true if there is at least one item in the cart...
Margin on child element moves parent element
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This is normal behaviour (among browser implementations at least). Margin does not affect the child's position in relation to its parent, unless the parent has padding, in which case most browsers will then add the child's margin to the parent's padding.
To get the behaviour you wan...
Check if a string is null or empty in XSLT
... The detailed semantics of this test is: return true if there is at least one categoryName element whose string value is an empty string.
– jelovirt
May 11 '09 at 6:08
14
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Managing relationships in Laravel, adhering to the repository pattern
...a non-sql data source).
ORMS
The trickiest part of this setup, for me at least, is determing if Eloquent is actually helping or harming us. ORMs are a tricky subject, because while they help us greatly from a practical point of view, they also couple your "business logic entities" code with the co...
Rails: update_attribute vs update_attributes
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Your statement about callbacks is incorrect, at least in Rails 3. It says very plainly in the comments in the source that "Callbacks are invoked".
– Batkins
Jan 29 '13 at 20:39
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Common MySQL fields and their appropriate data types
... US phone number is too big to be stored as an unsigned int, it must be at least a bigint.
5 Answers
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Explicit vs implicit SQL joins
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Performance wise, they are exactly the same (at least in SQL Server).
PS: Be aware that the IMPLICIT OUTER JOIN syntax is deprecated since SQL Server 2005. (The IMPLICIT INNER JOIN syntax as used in the question is still supported)
Deprecation of "Old Style" JOIN Syntax:...
WAMP shows error 'MSVCR100.dll' is missing when install
... 64bit windows runs 64 and 32 bit code. You will probably find you need at least one of the 32bit runtimes for some app/utility you will install at some point.
UPDATE
If you are running WAMPServer 2.5 you also need the VC11 redist. Visual C++ Redistributable for Visual Studio 2012
29.08.2014 wi...