Simple way to read single record from MySQL

Question

What\'s the best way with PHP to read a single record from a MySQL database? E.g.:

SELECT id FROM games

I was trying to find an answer in t

Answer 1

Better if SQL will be optimized with addion of LIMIT 1 in the end:

$query = "select id from games LIMIT 1";

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SO ANSWER IS (works on php 5.6.3):

If you want to get first item of first row(even if it is not ID column):

queryExec($query) -> fetch_array()[0];

If you want to get first row(single item from DB)

queryExec($query) -> fetch_assoc();

If you want to some exact column from first row

queryExec($query) -> fetch_assoc()['columnName'];

or need to fix query and use first written way :)

Answer 2

Warning! Your SQL isn't a good idea, because it will select all rows (no WHERE clause assumes "WHERE 1"!) and clog your application if you have a large number of rows. (What's the point of selecting 1,000 rows when 1 will do?) So instead, when selecting only one row, make sure you specify the LIMIT clause:

$sql = "SELECT id FROM games LIMIT 1";  // Select ONLY one, instead of all
$result = $db->query($sql);
$row = $result->fetch_assoc();
echo 'Game ID: '.$row['id'];

This difference requires MySQL to select only the first matching record, so ordering the table is important or you ought to use a WHERE clause. However, it's a whole lot less memory and time to find that one record, than to get every record and output row number one.

Answer 3

One more answer for object oriented style. Found this solution for me:

$id = $dbh->query("SELECT id FROM mytable WHERE mycolumn = 'foo'")->fetch_object()->id;

gives back just one id. Verify that your design ensures you got the right one.

Answer 4

First you connect to your database. Then you build the query string. Then you launch the query and store the result, and finally you fetch what rows you want from the result by using one of the fetch methods.

$link = mysql_connect('localhost','root','yourPassword')
mysql_select_db('database',$link);
$sql = 'SELECT id FROM games'
$result = mysql_query($sql,$link);

$singleRow = mysql_fetch_array($result) 
echo $singleRow;

Edit: So sorry, forgot the database connection. Added it now

Answer 5

I really like the philosophy of the ezSQL database library, which wraps the native SQL methods in an easier-to-use interface.

Fetching a single value from the database is trivial:

  $id = $db->get_var("SELECT id FROM games WHERE ...");

It also makes it easy to fetch a single row, column, or set of rows.

Answer 6

Easy way to Fetch Single Record from MySQL Database by using PHP List

The SQL Query is SELECT user_name from user_table WHERE user_id = 6

The PHP Code for the above Query is

$sql_select = "";
$sql_select .= "SELECT ";
$sql_select .= "  user_name ";
$sql_select .= "FROM user_table ";
$sql_select .= "WHERE user_id = 6" ;

$rs_id = mysql_query($sql_select, $link) or die(mysql_error());
list($userName) = mysql_fetch_row($rs_id);

Note: The List Concept should be applicable for Single Row Fetching not for Multiple Rows