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MySQL indexes - what are the best practices?
...e these from left to right. So if you have:
Table A
Id
Name
Category
Age
Description
if you have a compound index that includes Name/Category/Age in that order, these WHERE clauses would use the index:
WHERE Name='Eric' and Category='A'
WHERE Name='Eric' and Category='A' and Age > 18
but ...
How to design a product table for many kinds of product where each product has many parameters
...
To be honest, when I read the description of EAV in @Bills answer I did not quite understand what he was explaining. But when you said 3 columns: product ID, additional info name, additional info value I understood the concept. And I have actually done th...
How to sort List of objects by some property
...meStarted;
public long timeEnded;
private String name = "";
private String description = "";
private String event;
private boolean live = false;
public ActiveAlarm(long timeStarted,long timeEnded) {
this.timeStarted=timeStarted;
this.timeEnded=timeEnded;
}
public long getTimeStarted() {
...
Do I need elements in persistence.xml?
...stence>
<persistence-unit name="OrderManagement">
<description>This unit manages orders and customers.
It does not rely on any vendor-specific features and can
therefore be deployed to any persistence provider.
</description>
&...
Can I bind an array to an IN() condition?
...what if there will be string with comma inside? For example... FIND_IN_SET(description,'simple,search') will work, but FIND_IN_SET(description,'first value,text, with coma inside') will fail. So the function will search "first value", "text", "with coma inside" instead of desired "first value", "te...
Create Windows service from executable
...ce>
<id>hello</id>
<name>hello</name>
<description>This service runs the hello application</description>
<executable>node.exe</executable>
<!--
{{dir}} will be expanded to the containing directory of your
config file, ...
How to highlight and color gdb output during interactive debugging?
...splay. This is the case for PEDA or pwndbg. The latter gives the following description:
A PEDA replacement. In the spirit of our good friend windbg, pwndbg is pronounced pwnd-bag.
Speed
Resiliency
Clean code
It provides commands to support debugging and exploit development simil...
Proper way to make HTML nested list?
...ntain exactly zero or more li elements. The same applies to HTML5 ol.
The description list (HTML5 dl) is similar, but allows both dt and dd elements.
More Notes:
dl = definition list.
ol = ordered list (numbers).
ul = unordered list (bullets).
...
SQL query return data from multiple tables
...ma,
CREATE TABLE Software
(
ID INT,
SoftwareName VARCHAR(25),
Descriptions VARCHAR(150),
CONSTRAINT sw_pk PRIMARY KEY (ID),
CONSTRAINT sw_uq UNIQUE (SoftwareName)
);
INSERT INTO Software VALUES (1,'PaintMe','used for photo editing');
INSERT INTO Software VALUES (2,'World Map'...
What are the best practices for using Assembly Attributes?
...es:
[assembly: AssemblyTitle("Your assembly title")]
[assembly: AssemblyDescription("Your assembly description")]
[assembly: AssemblyCulture("The culture - if not neutral")]
[assembly: ComVisible(true/false)]
// unique id per assembly
[assembly: Guid("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")]...