Tutorials Programming Tutorials, Guides & Best Practices

DROP INDEX idx_last_name ON users;

Use the EXPLAIN command to analyze how a query uses indexes and to identify potential improvements:

MySQL Workbench provides a graphical interface for data import and export.

When dealing with large datasets, consider the following tips:

You can query various tables within the Performance Schema to gain insights into your database performance. For example, to see the top 10 queries by execution time, use:

SELECT * FROM performance_schema.events_statements_summary_by_digest
ORDER BY SUM_TIMER_WAIT DESC
LIMIT 10;

• Atomicity: Ensures that all operations within a transaction are completed successfully; if any operation fails, the entire transaction is rolled back.
• Consistency: Guarantees that a transaction will bring the database from one valid state to another, maintaining data integrity.
• Isolation: Ensures that the operations within a transaction are invisible to other transactions until the transaction is committed.
• Durability: Once a transaction is committed, its changes are permanent, even in the event of a system failure.

In MySQL, transactions are managed using the following commands:

To view the size of a specific database, you'll query the information_schema.tables table. This table contains metadata about all the tables in your databases.

Execute the following query, replacing your_database_name with the name of your database: