SQL PERFORMANCE HACKS PART 4 #sqltips #sqlperformance #sqlqueryinterviewquestionsandanswers

Leverage Database Functions Sparingly: Avoid using database functions like UPPER(), LOWER(), or DATE() on columns within WHERE clauses. Functions often prevent indexes from being used. Instead, modify the data before querying if possible.

Use Appropriate Data Types: Ensure that your table columns use the most appropriate and efficient data types. For instance, use INT instead of VARCHAR for numeric data, as it reduces memory usage and processing time.