What are some best practices for writing SQL queries?

What are some best practices for writing SQL queries?

Some best practices include using meaningful table and column names, avoiding SELECT *, and using JOINs instead of subqueries.

Why is it important to avoid SELECT *?

Using SELECT * can lead to performance issues, as it retrieves all columns, even those not needed, increasing data transfer.

Can you explain the importance of indexing?

Indexing improves query performance by allowing the database to find rows faster, especially in large tables.

What about SQL injection? How can I prevent it?

To prevent SQL injection, always use parameterized queries or prepared statements and validate user inputs.