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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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Accessing the index in 'for' loops?
How do I access the index in a for loop like the following?
20 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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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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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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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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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
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How do I handle too long index names in a Ruby on Rails ActiveRecord migration?
I am trying to add an unique index that gets created from the foreign keys of four associated tables:
9 Answers
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