如何在 SQL 列中获取 5 个最新值和计数

Question

According to the table, I have to count the top 3 most frequent bookID and the count of the bookID.

I have figured out how to get the top 3, however I couldn't figured how to display the number of count in the bracket after the comma.

I have to put these into the brackets separate by commas, it look like this:

[top1 bookid , the number of count] => [17,6]
[top2 bookid , the number of count] => [13,6]
[top3 bookid , the number of count] => [16,5]

$query ="SELECT bookID FROM issue_books GROUP BY bookID ORDER BY COUNT(*) DESC LIMIT 3 ";

$query_run = mysqli_query($connection,$query);

  foreach ($query_run as $row)
  { 
    echo '['". $row['bookID'];.",".xxxxx."']';
  }

Is there any way to display the count of the frequency number together?

Answer 1

Add the count to the select clause?

$query = "SELECT bookID, COUNT(*) AS cnt FROM issue_books GROUP BY bookID ORDER BY cnt DESC LIMIT 3 ";
$query_run = mysqli_query($connection, $query);
foreach ($query_run as $row) {
    echo "[" . $row['bookID'] . ", " . $row['cnt'] . "]\n";
}

Answer 2

You could add the count(*) to the select list:

$query =
"SELECT bookID, COUNT(*) AS cnt FROM issue_books GROUP BY bookID ORDER BY COUNT(*) DESC LIMIT 3 ";

$query_run = mysqli_query($connection,$query);

foreach ($query_run as $row)
{ 
    echo '[' . $row['bookID']; . ',' . $row['cnt'] . ']';
}