Question

MySQL / PHP: Get date for last day in the first week of month

Asked by: n00b0101

I've been playing with this for a while now and can't seem to figure it out...  Basically, I'm trying to return results for the first week of the month, but only for the 1st day through whatever date is the last day of the first week.  So, if the 1st lands on a Tuesday, I just want to pull results from the 1st through the 5th, but if it's a full week, then, it should return the week from Sun to Mon.  And, if it's the last week, and the week ends on a Wednesday, it should only pull Sunday Through Wednesday...  I've been using the query below, but it seems to pull the full 7 days regardless... 

SELECT 
FORMAT(SUM(IF(WEEK(sm.creation_date) = WEEK('2009-09-01'), bv.mtd_budgeted_sales, 0)), 2) AS a1WTD, 
FORMAT(SUM(IF(WEEK(sm.creation_date) = WEEK('2009-09-01'), bv.mtd_budget_covers, 0)), 2) AS a2WTD,
sm.summary_id
FROM base_values bv LEFT JOIN summaries sm ON bv.summary_id = sm.summary_id
WHERE sm.r_id = 6 AND WEEK(sm.creation_date) = WEEK('2009-09-01') GROUP BY sm.r_id;

                                  
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Asked On
2009-09-10 at 20:16:06ID24723533
Topics

MySQL Server

,

PHP and Databases

,

PHP Scripting Language

Participating Experts
1
Points
500
Comments
4

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Answers

 

by: nemws1Posted on 2009-09-10 at 21:43:57ID: 25306732

Yes, WEEK() won't quite give you the results you want, since Aug 31 & Sep 1 are in the same week (namely, week 35).  So we need to make sure we're also within the range of the first day to last day of the month as well.  MySQL has a LAST_DAY function, but not a FIRST_DAY function, so we have a bit of extra work there (I'm still looking for a better way than this to figure that out).

This should work for you:

SELECT 
    FORMAT(SUM(bv.mtd_budgeted_sales), 2) AS a1WTD, 
    FORMAT(SUM(bv.mtd_budget_covers), 2) AS a2WTD,
    sm.summary_id
FROM base_values bv LEFT JOIN summaries sm ON bv.summary_id = sm.summary_id
WHERE sm.r_id = 6
   AND WEEK(sm.creation_date) = WEEK('2009-09-01')
   AND sm.creation_date >= DATE(SUBDATE('2009-09-01',
                                        INTERVAL (DAY('2009-09-01')-1) DAY))
   AND sm.creation_date <= LAST_DAY('2009-09-01')
GROUP BY sm.r_id
;

                                              
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by: nemws1Posted on 2009-09-10 at 22:04:24ID: 25306799

Is sm.creation_date a DATE field or a DATETIME field?  The problem is that if you insert a DATE into a DATETIME field, the TIME is marked as midnight of that date, so it would be *before* any times throughout the day.  To fix it, we look for anything before the *next* day (which again, is midnight).  Note that an "=" has been removed from line 10.

Even if it is just a DATE field, this will still work:

SELECT 
    FORMAT(SUM(bv.mtd_budgeted_sales), 2) AS a1WTD, 
    FORMAT(SUM(bv.mtd_budget_covers), 2) AS a2WTD,
    sm.summary_id
FROM base_values bv LEFT JOIN summaries sm ON bv.summary_id = sm.summary_id
WHERE sm.r_id = 6
   AND WEEK(sm.creation_date) = WEEK('2009-09-01')
   AND sm.creation_date >= DATE(SUBDATE('2009-09-01',
                                        INTERVAL (DAY('2009-09-01')-1) DAY))
   AND sm.creation_date < ADDDATE(LAST_DAY('2009-09-01'), INTERVAL 1 DAY)
GROUP BY sm.r_id
;

                                              
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by: n00b0101Posted on 2009-09-12 at 11:33:53ID: 31627417

Thank you *so* much!

 

by: nemws1Posted on 2009-09-12 at 13:14:50ID: 25317731

Glad I could help. ;-)

20120131-EE-VQP-002

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