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What is the difference between a database and a data warehouse?
...solated data.
Entity relationship is used to design the database
DB size 100MB-GB simple transaction or quires
Datawarehouse
OLAP(Online Analytical process)
It is about Historical data Star schema,snow flexed schema and galaxy
schema is used to design the
data warehouse
DB size 100GB-TB ...
How is this fibonacci-function memoized?
...is asked for again. If we define some list, xs=[0..] and later ask for its 100th element, xs!!99, the 100th slot in the list gets "fleshed out", holding the number 99 now, ready for next access.
That is what that trick, "going-through-a-list", is exploiting. In normal doubly-recursve Fibonacci def...
What are the differences in die() and exit() in PHP?
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Even though this is about the 100th answer stating that they are equivalent (as also seen in my answer ^^), this really adds some VERY good points. Most of all that they are NOT the same in other languages (thus the confusion in the first place). (+1)
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What is Delegate? [closed]
...assing in the delegate method we wanted to use.
double tot1 = CalcMyTotal(100.34, CalcTotalMethod1);
double tot2 = CalcMyTotal(100.34, CalcTotalMethod2);
Console.WriteLine(tot1);
Console.WriteLine(tot2);
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How to increase font size in the Xcode editor?
...mindset does not seem to match the mindset of software engineers that make 100+ character variable and method names. Enough of my complaining)
I'll modify a previous post for the current version.
Close any projects you have open in Xcode (Otherwise the Font window will be inaccessible while a pro...
Android:What is difference between setFlags and addFlags for intent
...a integer which is power of two... in binary, flags look like this: 1, 10, 100, 1000, etc... (which in this case are 1, 2, 4, 8). So, what addFlags does is appending the integer you pass using the | operator.
// example...
// value of flags: 1
intent.setFlags(2|4);
// now flags have this value: 1...
How to sort an array of associative arrays by value of a given key in PHP?
...1-dev) array_multisort() is a few percent faster on small arrays and up to 100 times faster on big arrays (100+ elements)
– Josh Davis
Oct 22 '09 at 2:49
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How do I resolve “Cannot find module” error using Node.js?
...ce is cheap". I have libraries that I am using. The idea that I might have 100 copies (or worse, NEAR copies) makes my stomach turn. Disk space is cheap, but maintenance time is expensive. Perhaps if you are doing a one-off toy project, maintenance is cheap. For real work, however, maintenance is ex...
How to copy a row and insert in same table with a autoincrement field in MySQL?
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I think it's pretty good if you have a table with 100 of fields. Except there might be a not null constraint on the id which makes it fail
– Loïc Faure-Lacroix
Nov 30 '16 at 20:47
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How to efficiently build a tree from a flat structure?
...hich implements a O(n) solution, I created the following one (unit tested, 100% code coverage, only 0.5 kb in size and includes typings. Maybe it helps someone: npmjs.com/package/performant-array-to-tree
– Philip Stanislaus
May 7 '17 at 17:29
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