What are some common SQL query mistakes I should avoid?

What are some common SQL query mistakes I should avoid?

Some common SQL query mistakes include forgetting to use WHERE clauses, using incorrect JOIN types, and not indexing properly.

Can you explain why forgetting the WHERE clause is a mistake?

Forgetting the WHERE clause can lead to unintended updates or deletions of all records in a table, which can be catastrophic.

What about using the wrong JOIN type?

Using the wrong JOIN type can result in missing data or returning too much data, which can skew your results.

How can I avoid these mistakes?

To avoid these mistakes, always review your queries, use comments to clarify your logic, and test with small datasets first.