How should database and table names be structured in SQL queries when accessing multiple databases in PHP?

When accessing multiple databases in PHP, you need to specify the database name along with the table name in your SQL queries to avoid any ambiguity. You can achieve this by prefixing the table name with the database name followed by a dot. This ensures that the query is executed on the correct database and table.

// Specify the database name along with the table name in SQL queries
$sql = "SELECT * FROM database1.table1";
$result = mysqli_query($conn, $sql);

// Fetch data from the result set
while($row = mysqli_fetch_assoc($result)) {
    // Process the data
}