如何使用mysql和php获取所有列名

Question

I am trying to get the names of the fields (ie the structure of the table) in MySQL. I am using PHP to connect to MySQL.

This is my query:

SELECT `COLUMN_NAME`
FROM `INFORMATION_SCHEMA`.`COLUMNS`
WHERE `TABLE_SCHEMA`='database'
AND `TABLE_NAME`='Job Hunt'

And this is the PHP code:

$sql = "SELECT `COLUMN_NAME` FROM `INFORMATION_SCHEMA`.`COLUMNS` WHERE `TABLE_SCHEMA`='database' AND `TABLE_NAME`='Job Hunt'";
$result = mysqli_query($conn,$sql);
$row = mysqli_fetch_assoc($result);
print_r($row);

The output should read:

Array
    (
        [COLUMN_NAME] => id
        [COLUMN_NAME] => Company Name
        [COLUMN_NAME] => Address
        [COLUMN_NAME] => Date of Visit
    )

When I use the code above, the result only returns one row (or one "column header"):

Array
    (
        [COLUMN_NAME] => id
    )

How do I get an array of all the column names and what am I doing wrong?

Answer 1

You could use this to list down table columns.

SHOW COLUMNS FROM YOURTABLENAME;

OR

DESC YOURTABLENAME

In both the ways you can get your need done, whereas desc results you with associated column attributes as well.

EDIT

SELECT GROUP_CONCAT( COLUMN_NAME ) FROM INFORMATION_SCHEMA . COLUMNS WHERE TABLE_SCHEMA ='database' AND TABLE_NAME ='Job Hunt'

USE GROUP_CONCAT to achieve it, this will group all your column names into one record and in one column.

Find more aggregate functions here, http://dev.mysql.com/doc/refman/5.7/en/group-by-functions.html .