<ul><li>MySQL indexing is a crucial aspect for PHP developers to optimize database performance.</li><li>Indexing helps in quick searching and retrieval of data by creating a structured way of accessing information.</li><li>Dos of MySQL indexing include indexing columns used in WHERE, ORDER BY, and GROUP BY clauses.</li><li>Utilizing composite indexes for multiple column queries can enhance performance.</li><li>Indexing foreign keys speeds up join processes for table relationships.</li><li>Regularly analyzing queries with EXPLAIN and optimizing indexes is essential for efficient database operations.</li><li>Avoid over-indexing to prevent negative impacts on INSERT, UPDATE, and DELETE operations.</li><li>Avoid indexing columns with low cardinality and high repetition for better efficiency.</li><li>Be cautious when using functions or expressions in WHERE clauses to ensure effective index utilization.</li><li>Consider data types compatibility for indexed columns to prevent MySQL from using a complete table scan.</li></ul>

Indexing in MySQL for PHP Developers: Do’s and Don’ts

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