How to get all columns' names for all the tables in MySQL?

Question

Is there a fast way of getting all column names from all tables in MySQL, without having to list all the tables?

Answer 1

select * from information_schema.columns
where table_schema = 'your_db'
order by table_name,ordinal_position

Answer 2

To list all the fields from a table in MySQL:

select * 
  from information_schema.columns 
 where table_schema = 'your_DB_name' 
   and table_name = 'Your_tablename'

Answer 3

it is better that you use the following query to get all column names easily

Show columns from tablename

Answer 4

SELECT * FROM information_schema.columns
WHERE table_schema = DATABASE()
ORDER BY table_name, ordinal_position

Since I don't have enough rep to comment, here's a minor improvement (in my view) over nick rulez's excellent answer: replacing WHERE table_schema = 'your_db' with WHERE table_schema = DATABASE().

Answer 5

On the offchance that it's useful to anyone else, this will give you a comma-delimited list of the columns in each table:

SELECT table_name,GROUP_CONCAT(column_name ORDER BY ordinal_position)
FROM information_schema.columns
WHERE table_schema = DATABASE()
GROUP BY table_name
ORDER BY table_name

Note : When using tables with a high number of columns and/or with long field names, be aware of the group_concat_max_len limit, which can cause the data to get truncated.

Answer 6

<?php
        $table = 'orders';
        $query = "SHOW COLUMNS FROM $table";
        if($output = mysql_query($query)):
            $columns = array();
            while($result = mysql_fetch_assoc($output)):
                $columns[] = $result['Field'];
            endwhile;
        endif;
        echo '<pre>';
        print_r($columns);
        echo '</pre>';
?>

Answer 7

Similar to the answer posted by @suganya this doesn't directly answer the question but is a quicker alternative for a single table:

DESCRIBE column_name;

Answer 8

The question was :

Is there a fast way of getting all COLUMN NAMES from all tables in MySQL, without having to list all the tables?

SQL to get all information for each column

select * from information_schema.columns
where table_schema = 'your_db'
order by table_name,ordinal_position

SQL to get all COLUMN NAMES

select COLUMN_NAME from information_schema.columns
where table_schema = 'your_db'
order by table_name,ordinal_position

Answer 9

I wrote this silly thing a long time ago and still actually use it now and then:

https://gist.github.com/kphretiq/e2f924416a326895233d

Basically, it does a "SHOW TABLES", then a "DESCRIBE " on each table, then spits it out as markdown.

Just edit below the "if name" and go. You'll need to have pymysql installed.

Answer 10

Piggybacking on Nicola's answer with some readable php

$a = mysqli_query($conn,"select * from information_schema.columns
where table_schema = 'your_db'
order by table_name,ordinal_position");
$b = mysqli_fetch_all($a,MYSQLI_ASSOC);
$d = array();
foreach($b as $c){
    if(!is_array($d[$c['TABLE_NAME']])){
        $d[$c['TABLE_NAME']] = array();
    }
    $d[$c['TABLE_NAME']][] = $c['COLUMN_NAME'];
}
echo "<pre>",print_r($d),"</pre>";

Answer 11

You can query all columns per table in specific database using this query

select
    TABLE_SCHEMA,
    TABLE_NAME,
    COLUMN_NAME
from
    information_schema.columns
where
    table_schema = 'database_name'
order by 
    table_name,
    ordinal_position;