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SQL for last month

Thread began 1/05/2011 10:18 am by Daryl | Last modified 3/30/2011 8:18 am by Daryl | 1382 views | 9 replies |

DarylBeta Tester

SQL for last month

I am using the following query to find records for last month

SELECT * FROM application JOIN company JOIN users WHERE YEAR(application.application_date) = YEAR(CURDATE()) AND MONTH(application.application_date) = MONTH(CURDATE())-1 AND application.consultant_company = company.co_id AND application.consultant= users.id ORDER BY application.application_date DESC



However this does not work this month for last month. Any idea why and what I should change the sql too to get it to work?

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Ray BorduinWebAssist

That is because you are using:

MONTH(CURDATE())-1

and this being month 1, then that would look for a return value of month 0, when you actually want month 12.

Instead try:

MONTH(CURDATE() - INTERVAL 1 MONTH)

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DarylBeta Tester

Thanks Ray

But this doesn't show results from December 2010 either.

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Ray BorduinWebAssist

That is because you would also have to use:

YEAR(application.application_date) = YEAR(CURDATE() - INTERVAL 1 MONTH)

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DarylBeta Tester

Thanks Ray!!

Would

YEAR(CURDATE() - INTERVAL 2 MONTH)

show data from 2 months ago?

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Ray BorduinWebAssist

yes it would.

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DarylBeta Tester

Excellent!

Thanks again!

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DarylBeta Tester

What is the best code for PHP to do the same?

I am using;

For this month

php:
<?php $date date('F'); echo "$date";?>



For 1 month ago

php:
<?php
$mnth 
date('F');
$prev_mnth date('F',strtotime("-1 months")); // "previous month" works also
echo $prev_mnth;
?>



But they are both showing March today

For 2 months ago

php:
<?php
$mnth 
date('F');
$prev_mnth date('F',strtotime("-2 months")); // "previous month" works also
echo $prev_mnth;
?>



But this shows January as expected...

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DarylBeta Tester

This solution shows March instead of February too...

php:
<?php
$last_month_time 
mktime(000date("m")-1date("d"),   date("Y"));
$last_month date('F'$last_month_time);
echo 
"$last_month";
?>
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DarylBeta Tester

This one works!

php:
<?php echo date('F'mktime(000date('m')-11date('Y')));
?>
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