大约有 31,100 项符合查询结果（耗时：0.0330秒） [XML]
Does Foreign Key improve query performance?
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foreign keys do improve performance, at least in MySQL. Moreover, you're right, the creation of a FK does not create an index; the creation of a FK requires an index
– Félix Gagnon-Grenier
Aug 26 '14 at 17:31
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Nginx Different Domains on Same IP
... This fixed it for me. The problem seems to have been that in both of my server {} blocks, the sever_name directives were wildcards: .domain1.com and .domain2.com. Changing them to server_name www.domain1.com domain1.com; and server_name www.domain2.com domain2.com; now has the correct page for...
Can a unit test project load the target application's app.config file?
...answered Dec 5 '08 at 15:16
Jeromy IrvineJeromy Irvine
10.6k22 gold badges3838 silver badges5252 bronze badges
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How do I use IValidatableObject?
...in and again. So I modified it to be for a specific type of validation, in my case it was for an e-mail address.
[AttributeUsage(AttributeTargets.Property)]
class ValidEmailAddressIfTrueAttribute : ValidationAttribute
{
private readonly string _nameOfBoolProp;
public ValidEmailAddressIfTru...
Set variable in jinja
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if my variable is dict what now {% set dict.key = 'test' %} don't work
– Ib33X
Nov 11 '11 at 11:19
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Emulate a do-while loop in Python?
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My code below might be a useful implementation, highlighting the main difference between do-while vs while as I understand it.
So in this one case, you always go through the loop at least once.
first_pass = True
while firs...
Selecting data from two different servers in SQL Server
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Confirmed this fails in my env, error says I needed to use addlinkedserver
– gorlaz
Mar 14 '17 at 3:32
1
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What is a Maven artifact?
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If I have something called "com.example:mylibrary:1.0.0" (groupId:artifactId:version), that consists of a jar, a pom, and a source jar, which of the following is an artifact: 1. each file (pom, jar, source jar) is a separate artifact; 2. the set of files that share...
Keyboard shortcut to paste clipboard content into command prompt window (Win XP) [closed]
... Hey, that's cool. Here is how I use it: I have created a shortcut on my desktop to cmd.exe then right-clicked on it to "Pin to taskbar" - then delete the shortcut from the desktop... then I right click on it in the task bat, then right-click again when it shows cmd, and pick Properties. I go...
How to add a 'or' condition in #ifdef
..."\"
line continuation because you can't put a comment after it, so here is my method.
//|¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯|//
#ifdef CONDITION_01 //| |//
#define TEMP_MACRO //| |//
#endif ...