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SQL Server: Difference between PARTITION BY and GROUP BY
... group by modifies the entire query, like:
select customerId, count(*) as orderCount
from Orders
group by customerId
But partition by just works on a window function, like row_number:
select row_number() over (partition by customerId order by orderId)
as OrderNumberForThisCustomer
from Order...
How does PHP 'foreach' actually work?
...plicated. First of all, it should be noted that in PHP "arrays" are really ordered dictionaries and they will be traversed according to this order (which matches the insertion order as long as you didn't use something like sort). This is opposed to iterating by the natural order of the keys (how lis...
How to define a List bean in Spring?
...ing will automatically inject them into this list. If you need to preserve order (upper solution doesn't do that) you can do it in that way:
@Configuration
public class MyConfiguration {
@Autowired
private Stage1 stage1;
@Autowired
private Stage2 stage2;
@Bean
public List<Stage>...
What is this weird colon-member (“ : ”) syntax in the constructor?
...re also a bunch of other reasons for using init lists. especially when the order of initialisation matters. It's a shame it has such a stupid fake function call syntax.
– Martin Beckett
Nov 10 '09 at 23:50
...
Make XAMPP/Apache serve file outside of htdocs [closed]
...ocalhost
<Directory C:\Projects\transitCalculator\trunk>
Order allow,deny
Allow from all
</Directory>
</VirtualHost>
Open your hosts file (C:\Windows\System32\drivers\etc\hosts).
Add
127.0.0.1 transitcalculator.localhost #transitCalculator
to the end of ...
How do I reverse a C++ vector?
...se vector of vectors? I want v[0] to be swapped with v[v.size()-1] and the order of v[0][i] element remain as it is. This is similar to changing order of rows (if a vector is viewed as a Matrix). If a vector is defined as: vector<vector<int> > v; reverse(v.begin(), v.end()) doesn't rever...
Node.js / Express.js - How does app.router work?
... next() or make it so no more middleware get called. That means that the order in which I place my middleware calls is important, because some middleware depends on other middleware, and some middleware near the end might not even be called.
...
Can we call the function written in one JavaScript in another JS file?
...
The answer above has an incorrect assumption that the order of inclusion of the files matter. As the alertNumber function is not called until the alertOne function is called. As long as both files are included by time alertOne is called the order of the files does not matter:
[...
Why when a constructor is annotated with @JsonCreator, its arguments must be annotated with @JsonPro
...
Jackson has to know in what order to pass fields from a JSON object to the constructor.
It is not possible to access parameter names in Java using reflection - that's why you have to repeat this information in annotations.
...
Is it possible to set the stacking order of pseudo-elements below their parent element? [duplicate]
..., you have to create a new stacking context to change the default stacking order.
Positioning the pseudo-element (absolute) and assigning a z-index value other than “auto” creates the new stacking context.
#element {
position: relative; /* optional */
width: 100px;
height: ...