What are the potential pitfalls of using INNER and LEFT JOIN in PHP MySQLi queries?

When using INNER JOIN and LEFT JOIN in PHP MySQLi queries, potential pitfalls include returning unexpected results due to incorrect join conditions or missing data. To avoid these issues, always double-check the join conditions to ensure they are accurate and relevant to the tables being joined. 

// Example of using INNER JOIN with accurate join conditions
$query = "SELECT * FROM table1 INNER JOIN table2 ON table1.id = table2.id";
$result = $conn->query($query);

// Example of using LEFT JOIN with accurate join conditions
$query = "SELECT * FROM table1 LEFT JOIN table2 ON table1.id = table2.id";
$result = $conn->query($query);

Keywords

INNER JOIN LEFT JOIN MySQLi queries pitfalls

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