fetching data from backend, only single character and adding data

Question

4.00/5 (1 vote)

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SQL

create table test
(
	name varchar(20),
	gender varchar(20),
	salary varchar(20)
);

insert into test values ('nm1','male','20000');
insert into test values ('nm2','female','85000');
insert into test values ('nm3','male','1000');
insert into test values ('nm4','unknown',NULL);

I am new to PHP, just learning.

I've a sample data of my table. While showing data in front, for gender I've to show
only the first character i.e. m/f/u and for salary I've to sum the total amount from front i.e
by using PHP.
also in my table salary is in varchar would I've to parse it as number?

PHP

<pre lang="xml"><?php
        include('conn.php');
        $result =mysql_query("select * from test")
            or die(mysql_error());

        echo "<table cellpadding = '10'>";
        echo "<tr>
                <th>name:</th>
                <th>gender:</th>
                <th>total salary:</th>
            </tr>";

        while($row = mysql_fetch_array($result))
        {
            echo "<tr>";
            echo '<td>'.$row['name'].'</td>';
            echo '<td>'.$row['gender'].'</td>';
            echo '<td>'.$row['salary'].'</td>';
        }
    ?>

Posted 15-Jan-13 23:48pm

nischalinn

Updated 20-Jan-13 22:05pm

v2

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Kislay Raj · Answer 1 · 2013-01-18T01:16:00

Solution 1

in gender you can use

echo '<table><tbody><tr><td>'.substr($row['gender'],0,1).'</td></tr></tbody></table>';
instead  of echo '<table><tbody><tr><td>'.$row['gender'].'</td></tr></tbody></table>';

and you don't have to change it to number or double. php will auto convert it

Posted 18-Jan-13 1:16am

Kislay Raj

Comments

nischalinn 20-Jan-13 22:58pm

Thank you. What about getting the total sum of salary??

Kislay Raj 23-Jan-13 14:15pm

mean what you have all names are unique, each have unique salary value it's not monthly or any other period you have describe so they will give the values what you have entered if you want to get all sum value of salary you can use Sum

SELECT SUM(salary) FROM test

if you want to sum in php then set a variable like
$a=0;
before while and in while loop use
$a+=$row['salary'];