What is the difference between SQL indexes and keys?
An example of an AI chatbot conversation about SQL indexes and keys.
What is the difference between SQL indexes and keys?
SQL indexes are used to speed up the retrieval of rows from a database table, while keys are used to uniquely identify rows.
Can you explain how indexes improve query performance?
Indexes create a data structure that allows the database to find rows faster, reducing the amount of data it needs to scan.
Are there different types of indexes?
Yes, there are several types of indexes, including unique indexes, composite indexes, and full-text indexes, each serving different purposes.
When should I use a primary key versus a foreign key?
A primary key uniquely identifies a record in a table, while a foreign key establishes a relationship between two tables.
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