Get number of fields in mysql table - php

Question

How can I get number of fields(сolumns) in mysql table with PHP or just some kind of mysql query? Is there a way to do this without SELECT * FROM table_name and mysql_num_fields()? Maybe there is a way with one mysql query?

Answer 1

SELECT COUNT(*) totalColumns
FROM INFORMATION_SCHEMA.COLUMNS
WHERE table_name = 'table1' AND
TABLE_SCHEMA = 'databaseName'
SQLFiddle Demo

Answer 2

Use the below query to get no of fields in table,
SELECT COUNT(*)
FROM INFORMATION_SCHEMA.COLUMNS
WHERE table_schema = 'database_name'
AND table_name = 'tbl_name'

Answer 3

#user1858864 All the above answers are fine but I just wanted to give it to you in php using pdo .
And I did up vote your question and their answers because everything seems to be relevant to me
A big thanks to #JW. For editing
<?php
try {
$con = new PDO('mysql:host=localhost;dbname=mydb;charset=utf-8','root','');
} catch(PDOException $e){
echo 'Connection failed'.$e->getMessage();
}
#count in pdo
$count = ("SELECT count(*) FROM table_name ");
$result =$con->prepare($count);
$result->execute();
$number= $result->fetchColumn();
echo $number;
#count in pdo
?>

Answer 4

$query = "select book_name from tbllibrary "; $result = mysql_query($query);
//while loop to display mysql table field values in html text boxes
$i = 0;
while ($row = mysql_fetch_row($result))
{
$count = count($row);
$y = 0;
while ($y < $count)
{
$c_row = current($row);
next($row);
$y = $y + 1;
}
$book_name=$c_row;$i = $i + 1;
}
echo 'There are ' . $i. ' books available in the Library</p>';
Here the variable i will store total no.of columns for the row named book_name. You can also use the variable $book name for the future use but it is not mandatory.

Answer 5

You can use the following query
SELECT count(*) FROM table_name