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INNER JOIN ON vs WHERE clause
...o has a STRAIGHT_JOIN clause.
Using this clause, you can control the JOIN order: which table is scanned in the outer loop and which one is in the inner loop.
You cannot control this in MySQL using WHERE syntax.
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Why use Ruby instead of Smalltalk? [closed]
...e is no best language and any software engineer can do lisp, scheme, ruby, php or c or whatever. And if he can't, he can learn it in 2 weeks. A language is just a tool. You don't need to sleep with it.
– Edgar Klerks
Apr 7 '15 at 18:15
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What does the git index contain EXACTLY?
...ndex file has the following format
All binary numbers are in network byte order.
Version 2 is described here unless stated otherwise.
A 12-byte header consisting of:
4-byte signature:
The signature is { 'D', 'I', 'R', 'C' } (stands for "dircache")
4-byte version number:
The current supported ver...
Numpy argsort - what is it doing?
...ermutation (that if the 2 permutations are applied to each other in either order the result is the Identity). The second permutation if applied to a sorted data array would produce the unsorted data array, i.e. it is the rank.
– Alex C
May 18 '16 at 0:35
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How do you list the primary key of a SQL Server table?
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FYI- this does not necessarily list the columns in order. See this answer to similar question if you need the columns in their particular order: stackoverflow.com/a/3942921/18511
– Kip
Feb 4 '13 at 3:17
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Can you have multiple $(document).ready(function(){ … }); sections?
...'Hello Dexter!');
});
You'll find that it's equivalent to this, note the order of execution:
$(document).ready(function() {
alert('Hello Tom!');
alert('Hello Jeff!');
alert('Hello Dexter!');
});
It's also worth noting that a function defined within one $(document).ready block cannot...
How to configure socket connect timeout
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I just wrote an extension class in order to allow timeouts in connections. Use it exactly as you would use the standard Connect() methods, with an extra parameter named timeout.
using System;
using System.Net;
using System.Net.Sockets;
/// <summary>
//...
CentOS 64 bit bad ELF interpreter
...Jessie 32-bit libraries ).
I installed apt-get install -y gcc-multilib in order to run 32-bit executable file in my docker container based on debian:jessie.
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Amazon EC2, mysql aborting start because InnoDB: mmap (x bytes) failed; errno 12
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Restarting nginx and php-fpm also released enough memory to allow mysql to start! Thanks!
– msEmmaMays
May 6 '13 at 17:15
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INNER JOIN vs LEFT JOIN performance in SQL Server
...clustered index scans with a seek - meaning that this will literally be an order of magnitude faster with a large number of rows.
So the conclusion is more or less what I mentioned several paragraphs above; this is almost certainly an indexing or index coverage problem, possibly combined with one o...