How do SQL keys affect database performance?
An example of an AI chatbot conversation about SQL keys and their impact on performance.
How do SQL keys affect database performance?
SQL keys, such as primary and foreign keys, play a crucial role in database performance by ensuring data integrity and optimizing query execution.
Can you explain the difference between primary keys and foreign keys?
Sure! A primary key uniquely identifies each record in a table, while a foreign key establishes a relationship between two tables by referencing the primary key of another table.
What are some best practices for using keys in SQL?
Best practices include using primary keys for unique identification, indexing foreign keys for faster joins, and avoiding composite keys when possible.
How do indexes relate to keys in SQL?
Indexes improve the speed of data retrieval operations on a database table, and they are often created on primary and foreign keys to enhance performance.
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