When selecting records based on a specific time range, which data type (DATETIME or timestamp) is more efficient for faster query performance in MySQL?

When selecting records based on a specific time range in MySQL, using the DATETIME data type is generally more efficient for faster query performance compared to the timestamp data type. This is because DATETIME stores the date and time information as a fixed string format, making it easier for MySQL to perform range-based queries. On the other hand, the timestamp data type is stored in a binary format, which can cause additional processing overhead for range queries. 

// Example query using DATETIME data type
$query = "SELECT * FROM table_name WHERE date_column BETWEEN '2022-01-01 00:00:00' AND '2022-01-31 23:59:59'";
$result = mysqli_query($connection, $query);

// Loop through the results
while ($row = mysqli_fetch_assoc($result)) {
    // Process the data
}

Keywords

PHP MySQL DATETIME timestamp query performance

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