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How do MySQL indexes work?
I am really interested in how MySQL indexes work, more specifically, how can they return the data requested without scanning the entire table?
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How does database indexing work? [closed]
Given that indexing is so important as your data set increases in size, can someone explain how indexing works at a database-agnostic level?
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Differences between INDEX, PRIMARY, UNIQUE, FULLTEXT in MySQL?
What are the differences between PRIMARY, UNIQUE, INDEX and FULLTEXT when creating MySQL tables?
3 Answers
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Postgres and Indexes on Foreign Keys and Primary Keys
Does Postgres automatically put indexes on Foreign Keys and Primary Keys? How can I tell? Is there a command that will return all indexes on a table?
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How to convert 1 to true or 0 to false upon model fetch
...d"]==="0"); // false
console.log(obj["isChecked"]==="Elephant"); // false
PHP
Same concept in PHP
$obj["isChecked"] = ($obj["isChecked"] == "1");
The same operator limitations as stated above for JavaScript apply.
Double Not
The 'double not' also works. It's confusing when people first read it but...
Is it possible to perform a 'grep search' in all the branches of a Git project?
...$ git grep-branch-local -n getTastyCookies
dev:53:modules/factory/getters.php:function getTastyCookies($user);
master:50:modules/factory/getters.php:function getTastyCookies($user)
The current structure is:
: - Separator
Branch: dev
Line number: 53
File path: modules/factory/getters.php
Matchi...
sql primary key and index
...base set as the primary key. If I query off the ID often do I also need to index it? Or does it being a primary key mean it's already indexed?
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Should I index a bit field in SQL Server?
I remember reading at one point that indexing a field with low cardinality (a low number of distinct values) is not really worth doing. I admit I don't know enough about how indexes work to understand why that is.
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What does the git index contain EXACTLY?
What does the Git index exactly contain, and what command can I use to view the content of the index?
5 Answers
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How to see indexes for a database or table in MySQL?
How do I see if my database has any indexes on it?
9 Answers
9
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