What are the potential pitfalls of using SELECT * in PHP when querying a database?

Using SELECT * in PHP when querying a database can lead to performance issues and unnecessary data retrieval, as it fetches all columns from the table even if they are not needed. This can result in increased memory usage and slower query execution times. To avoid these pitfalls, it is recommended to explicitly specify the columns you want to retrieve in the SELECT statement. 

// Specify the columns you want to retrieve instead of using SELECT *
$query = "SELECT column1, column2, column3 FROM table_name WHERE condition = 'value'";
$result = mysqli_query($connection, $query);

// Fetch and process the results
while ($row = mysqli_fetch_assoc($result)) {
    // Process the data
}

Keywords

SELECT * PHP database query performance

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