Sql Programming Tutorials, Guides & Best Practices

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LOAD DATA INFILE is a fast way to import data from text files, such as CSV, into a MySQL table.

To import data from a CSV file, use the following SQL statement:

Ensure that the columns used in joins have indexes. This can significantly reduce the time taken to execute join operations.

Efficient SELECT statements can greatly improve query performance.

In MySQL, transactions are managed using the following commands:

• START TRANSACTION: Begins a new transaction.
• COMMIT: Saves the changes made in the transaction permanently.
• ROLLBACK: Reverts the changes made in the transaction.

SELECT table_name AS "Table",
       ROUND((data_length + index_length) / 1024 / 1024, 2) AS "Size (MB)"
FROM information_schema.tables
WHERE table_schema = 'your_database_name'
ORDER BY (data_length + index_length) DESC
LIMIT 1;

• table_name: The name of each table in the specified database.
• ORDER BY (data_length + index_length) DESC: Orders the tables by size in descending order, so the largest appears first.
• LIMIT 1: Limits the result to only the largest table.