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# Displaying Difference for Totals

Posted on 2007-10-01
Medium Priority
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Last Modified: 2013-12-13
I have for example the table data results below (the first 3 columns):

Division          Quota           Total          New Column
1                    1600             1610          10
2                    400               220            -180
3                    900               800            -100
4                    850               900            50
5                    1300             1200          -100

I want to add a fourth column (New Column) that will calculate the difference between the "Quota" column and the "Total" column. For example: the first row has 1600 for the Quota and 1610 for the Total. So it should display the difference which is 10.

The second row for example: has 400 for the Quota and 220 for the Total. So it falls into the negative and displays -180.

So basically, I need it to display the amount if it was over or under. How would something like this be done?

Here is the PHP code:

<?php

echo "<table cellpadding=\'2\' cellspacing=\'0\'>";

echo "<tr>";
echo "<td class=\"th\" >Division</td>";
echo "<td class=\"th\" >Quota</td>";
echo "<td class=\"th\" >Total</td>";

if(\$result && mysql_num_rows(\$result) > 0)
{    for (\$i = 0; \$i < mysql_num_rows(\$result); \$i++) {
\$resultArray[\$i] = mysql_fetch_array(\$result);
}

foreach (\$resultArray as \$val) {
echo ('<tr>');//first row
if ((\$rowcount%2) == 0) {
\$css_class = "\"row\"";
} else {
\$css_class = "\"alt\"";
}

echo ('<td class=' . \$css_class . ' align=default >'.\$val[1].'</td>');
echo ('<td class=' . \$css_class . ' align=default >'.\$val[2].'</td>');
echo ('<td class=' . \$css_class . ' align=default >'.\$val[3].'</td>');
echo ('</tr>');
}

} // end if results
echo ('</table>');

?>
0
Question by:fcruz5
• 3
• 3
6 Comments

LVL 5

Expert Comment

ID: 19991872
Add this, what it does is return absolute value of subtraction of the two desired columns (-1 becomes 1):
echo ('<td class=' . \$css_class . ' align=default >'.abs(\$val[3]-\$val[2]).'</td>');
0

Author Comment

ID: 19992615
Thanks, it shows the difference now. But, theres one more thing that I am trying to display.

Division          Quota           Total          New Column
1                    1600             1610          10
2                    400               220            -180
3                    900               800            -100
4                    850               900            50
5                    1300             1200          -100

For example, take a look at the 2nd row with 400 as the Quota and 220 for the Total. For the totals that are below the Quota like this one, it should display a (-) symbol in front of the number. The difference is 180. Can it display as -180 like the example above?

0

LVL 5

Expert Comment

ID: 19992704
I am not sure I quite follow you. First you need absolute value, now not ;) Unless you want a fifth column.

In that case, it's just a matter of subtracting the right value from the other:

echo ('<td class=' . \$css_class . ' align=default >'.(\$val[3]-\$val[2]).'</td>');

Two examples:

\$val[3] = 220
\$val[2] = 400
\$val[3]-\$val[2] = 220-400 = -180

\$val[3] = 1610
\$val[2] = 1600
\$val[3]-\$val[2] = 1610-1600 = 10

0

Author Comment

ID: 19992891
The first example below that you gave me displays the correct differences like this:

echo ('<td class=' . \$css_class . ' align=default >'.abs(\$val[3]-\$val[2]).'</td>');

Division          Quota           Total          New Column
1                    1600             1610          10
2                    400               220            180
3                    900               800            100
4                    850               900            50
5                    1300             1200          100

=========================================================

The only thing that is missing is the (-) sign in front of the values for the Totals that fall under the Quota. That way you can see if the Division was over or under the Quota.

Any number under the "Total" column that is below the number under the Quota column will have minus (-) sign in front of it like in rows 2, 3, and 5. See the below example.

The total 220 falls under the 400 Quota so the difference 180 displays as -180
The total 800 falls under the 900 Quota so the difference 100 displays as -100
The total 1200 falls under the 1300 Quota so the difference 100 displays as -100

Division          Quota           Total          New Column
1                    1600             1610          10
2                    400               220            -180
3                    900               800            -100
4                    850               900            50
5                    1300             1200          -100

0

LVL 5

Accepted Solution

frin earned 2000 total points
ID: 19993459
Yes, you need to drop abs :) Abs removes the minuses. So if you want to keep those minuses, the code should look like this:

<?php

echo "<table cellpadding=\'2\' cellspacing=\'0\'>";

echo "<tr>";
echo "<td class=\"th\" >Division</td>";
echo "<td class=\"th\" >Quota</td>";
echo "<td class=\"th\" >Total</td>";
echo "<td class=\"th\" >New Column</td>";
echo "</tr>";

if(\$result && mysql_num_rows(\$result) > 0)
{    for (\$i = 0; \$i < mysql_num_rows(\$result); \$i++) {
\$resultArray[\$i] = mysql_fetch_array(\$result);
}

foreach (\$resultArray as \$val) {
echo ('<tr>');//first row
if ((\$rowcount%2) == 0) {
\$css_class = "\"row\"";
} else {
\$css_class = "\"alt\"";
}

echo ('<td class=' . \$css_class . ' align=default >'.\$val[1].'</td>');
echo ('<td class=' . \$css_class . ' align=default >'.\$val[2].'</td>');
echo ('<td class=' . \$css_class . ' align=default >'.\$val[3].'</td>');
echo ('<td class=' . \$css_class . ' align=default >'.(\$val[3]-\$val[2]).'</td>');
echo ('</tr>');
}

} // end if results
echo ('</table>');

?>
0

Author Comment

ID: 19993849
Thanks
0

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