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Efficient paging in SQLite with millions of records
... *
FROM MyTable
WHERE SomeColumn > LastValue
ORDER BY SomeColumn
LIMIT 100;
(This is explained with more detail on the SQLite wiki.)
When you have multiple sort columns (and SQLite 3.15 or later), you can use a row value comparison for this:
SELECT *
FROM MyTable
WHERE (SomeColumn, OtherColum...
PHP foreach change original array values
...
270
In PHP, passing by reference (&) is ... controversial. I recommend not using it unless you k...
Eager load polymorphic
...
209
My guess is that your models look like this:
class User < ActiveRecord::Base
has_many :re...
How to make pipes work with Runtime.exec()?
...
answered May 8 '11 at 15:20
KajKaj
10.4k11 gold badge2929 silver badges2727 bronze badges
...
Xcode 4.2 - declaration of '…' will not be visible outside of this function warning
...ability.h
– brainray
Feb 24 '12 at 10:05
8
#include, not #import. Due to subtle differences betwe...
Mapping composite keys using EF code first
...ld need to do in your code:
public class MyTable
{
[Key, Column(Order = 0)]
public string SomeId { get; set; }
[Key, Column(Order = 1)]
public int OtherId { get; set; }
}
You can also look at this SO question. If you want official documentation, I would recommend looking at the official ...
How to find current transaction level?
...
Run this:
SELECT CASE transaction_isolation_level
WHEN 0 THEN 'Unspecified'
WHEN 1 THEN 'ReadUncommitted'
WHEN 2 THEN 'ReadCommitted'
WHEN 3 THEN 'Repeatable'
WHEN 4 THEN 'Serializable'
WHEN 5 THEN 'Snapshot' END AS TRANSACTION_ISOLATION_LEVEL
FROM sys.dm_exec_sessions
whe...
How to save a data.frame in R?
...
Sacha EpskampSacha Epskamp
40.5k1616 gold badges100100 silver badges128128 bronze badges
...
Limits of Nat type in Shapeless
...
+50
I will attempt one myself. I will gladly accept a better answer from Travis Brown or Miles Sabin.
Nat can currently not be used to re...
What is the difference between exit() and abort()?
... objects though. So
A a;
void test() {
static A b;
A c;
exit(0);
}
Will destruct a and b properly, but will not call destructors of c. abort() wouldn't call destructors of neither objects. As this is unfortunate, the C++ Standard describes an alternative mechanism which ensures prope...