Question

 CREATE TABLE `tbl_atn` (
`atn_id` int(15) NOT NULL AUTO_INCREMENT,
`eng_id` int(15) DEFAULT NULL,
`visit` varchar(50) DEFAULT NULL,
`travel` varchar(50) DEFAULT NULL,
`start_time` varchar(50) DEFAULT NULL,
`mile` varchar(50) DEFAULT NULL,
`end_time` varchar(50) DEFAULT NULL,
`comments` varchar(100) DEFAULT NULL,
`actual` varchar(50) DEFAULT NULL,
`total_job` varchar(50) DEFAULT NULL,
`regular` varchar(50) DEFAULT NULL,
`over` varchar(50) DEFAULT NULL,
`total_hrs` varchar(50) DEFAULT NULL,
`pay` varchar(50) DEFAULT NULL,
`timestamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
`atn_date` date DEFAULT NULL,
 PRIMARY KEY (`atn_id`)
 )

What I want to do is create is month report for each month. All specific dates are displayed and records from above table if no record then empty

The above is my table. I am trying to create this application, but due to this sheet I am stuck. First of all, can this only be achieved using a MySQL query? If not, what I have to do is generate all dates first, then for each date I have to fetch a record from the database then run another query to sum them up. I am unable to create a query for that.

Any help?

   $now = date('Y-m-d');
   $month = date("m",strtotime($now));
   $year = date("Y",strtotime($now));


   $first = date('Y-m-d', mktime(0, 0, 0, $month, 1, $year));
   $last = date('Y-m-t', mktime(0, 0, 0, $month, 1, $year));

   $thisTime = strtotime($first);
   $endTime = strtotime($last);
   while($thisTime <= $endTime)
   {
   $thisDate = date('Y-m-d', $thisTime);
   echo $thisDate."<br>";

   $thisTime = strtotime('+1 day', $thisTime); // increment for loop
   }

Made this code now dynamic now i can get all the dates of any month given month and year is given now what i will do now is make a function that will loop thru all dates and send query to database to find data if found it will set values other wise zero is it right approach ?

Answer 1

A common way of displaying a contiguous sequence when your table may have none or only some of the records in your range of interest, is to use an integer table. An integer table contains integers from 0 to 9 in sequence. When you need a set of sequential numbers you self join it to get what you want. So for a range from 5 to 25 do

SELECT i.n + j.n*10 as num
FROM myints i CROSS JOIN myints j
WHERE (i.n + j.n*10) BETWEEN 5 AND 25
ORDER BY (i.n + j.n*10);

In your case you want sequential dates. You know that any particular month can have at most 31 days, so you do a subquery for a set of integers from 0 to 31 and express them as dates starting on your beginning of month and finishing on your end of month. Like so:

SELECT DATE_ADD('2012-06-01', INTERVAL n.num DAY) AS mydate, o.*
FROM
    (SELECT i.n + j.n*10 as num
    FROM myints i CROSS JOIN myints j
    WHERE (i.n + j.n*10) BETWEEN 0 AND 31
    ORDER BY (i.n + j.n*10)) AS n
LEFT JOIN other o ON ( DATE_ADD('2012-06-01', INTERVAL n.num DAY) = o.atn_date)
WHERE mydate BETWEEN '2012-06-01 '2012-06-30';

or

SELECT datelist.mydate, o.* FROM
    (SELECT DATE_ADD( '2012-01-06', INTERVAL i.n + j.n*10 DAY) as mydate
      FROM myints i CROSS JOIN myints j
      WHERE mydate BETWEEN '2012-01-06' AND '2012-01-30'
      ORDER BY (i.n + j.n*10)) datelist
LEFT JOIN othertable o ON (datelist.mydate=o.atn_date);