Question

I’m trying to select the year in MySQL with PHP with this:

session_start();
$school_id = $_SESSION['school_id'];
$section_id = $_POST['section_id'];
$today  = date("Y");

$select_grades_deped = "SELECT * 
             FROM deped_grade_archive 
             WHERE school_id='$school_id'
             AND section_id='$section_id'
             AND year(submission_date) ='$today' ";

$query_check_grades= mysql_query($select_grades_deped) or die (mysql_error());

$check_count = mysql_num_rows($query_check_grades);

if($check_count == 0){
    $return['checked'] = "0";
}
else{
    $return['checked'] = "1";
}

echo json_encode($return);

But unfortunately when I tried the following:

SELECT year( submission_date )
FROM deped_grade_archive
WHERE school_id = '$school_id'
AND section_id = '$section_id'

It returned zero values from my table. I change the data type of submission_date into date data type because it was varchar before but there still no use. Please help guys.

Answer 1

When changing it to the date data type, if you don’t set a default value for the column (such as CURRENT_TIMESTAMP), the value will be 0000-00-00. Thus, the YEAR operation will return 0 as shown.

You’ll need to update your submission_date column to the time you wish to specify for each row.