To start with, I'm sorry for the format. It's my first time and I really don't know how to show tables here.
This is my syntax:
SELECT order.id, order.begin, order.end, report.id,
DATE_FORMAT( report.add_date, '%Y-%m-%d' ) AS report_add_date, sums.id, sums.qty
FROM order, report, sums
WHERE (report.add_date BETWEEN order.begin AND order.end)
AND (report.id = sums.id)
ORDER BY order.id ASC
It gives the following result:
order.id | order.begin | order.end | report.id | report.add_date | sums.id | sums.qty
255 | 2013-10-21 | 2013-10-22 | 390 | 2013-10-21 | 390 | 250
256 | 2013-10-22 | 2013-10-23 | 393 | 2013-10-22 | 393 | 385
The final result should look like this:
order.id | order.begin | order.end | report.id | report.add_date | sums.id | sums.qty
255 | 2013-10-21 | 2013-10-22 | 390 | 2013-10-21 | 390 | 250
255 | 2013-10-21 | 2013-10-22 | 393 | 2013-10-22 | 393 | 385
256 | 2013-10-22 | 2013-10-23 | 393 | 2013-10-22 | 393 | 385
Hopefully, you can see, that I am trying to get all sums.qty for all order.id where report.add_date is between order.begin and order.end date.
There are 3 tables: order, report and sums.
Order contains the range dates (begin-end). Report contains date (add_date). Sums contains qty and it's related to Report by id.
Order.id 255 should get all sums.qty for dates between 2013-10-21 and 2013-10-22.
Order.id 256 should get all sums.qty for dates between 2013-10-22 and 2013-10-23.
The first one doesn't get sums.qty for the date of 2013-10-22, because this one goes to the latter.
As far as I understand, it doesn't repeat rows, so it shows every row only ones. So it stops assigning report.id to the previous order.id when the following order.id begins with the date the previous one ends.
What am I doing wrong? Thank you in advance!
I'm guessing add_date is a DATETIME and you're not converting it to DATE in your BETWEEN criteria. A date has a 0 time, so though BETWEEN is inclusive it won't include the same date if there is a non-zero time portion attached to it.
I'd also suggest switching to explicit joins as implicit joins have been deprecated for ages.
Related
I am looking for laravel developer to solve a simple issue. I have 3 tables that I am joining to get data. Model data is like this:
date | order number | amount
I need to group by date and find the sum of amount. Like this:
date | order number | amount
12/06/2022 | ask20 | 150
12/06/2022 | ask20 | 50
13/06/2022 | ask21 | 120
15/06/2022 | ask20 | 110
15/06/2022 | ask23 | 10
16/06/2022 | ask20 | 30
Now, I need to group by date to get the value like this:
date | order number | amount
12/06/2022 | ask20 | 200 (added value)
13/06/2022 | ask21 | 120
15/06/2022 | ask20 | 110 (not added as the order number is different)
15/06/2022 | ask23 | 10
16/06/2022 | ask20 | 30
Remember, I am getting this data by joining 3 tables, Can anyone help solve this?
This seems a simple SUM function -
SELECT date, order_number, SUM(amount)
FROM <YOUR BIGGER QUERY..>
GROUP BY date, order_number
I have the following query:
SELECT `Time`,
`Resolution`,
HOUR(TIMEDIFF(`Resolution`,`Time`)),
TIMEDIFF(`Resolution`,`Time`),
datediff(`Resolution`,`Time`)
FROM Cases;
In order to debug, I add the TIMEDIFF without the HOUR before, just to see if the result is different. I use datediff to double check.
The result of the query is:
+---------------------+---------------------+-------------------------------------+-------------------------------+-------------------------------+
| Time | Resolution | HOUR(TIMEDIFF(`Resolution`,`Time`)) | TIMEDIFF(`Resolution`,`Time`) | datediff(`Resolution`,`Time`) |
+---------------------+---------------------+-------------------------------------+-------------------------------+-------------------------------+
| 2017-01-10 13:35:00 | 2017-01-24 10:52:00 | 333 | 333:17:00 | 14 |
| 2017-01-12 15:53:00 | 2017-02-21 16:06:00 | 838 | 838:59:59 | 40 |
| 2017-01-18 09:19:00 | 2017-01-18 13:39:00 | 4 | 04:20:00 | 0 |
| 2017-01-23 09:00:00 | 2017-01-23 15:08:00 | 6 | 06:08:00 | 0 |
| 2017-01-24 08:49:00 | 2017-02-20 14:34:00 | 653 | 653:45:00 | 27 |
Actually, it delivers more lines, but the relevant line is the 2 result - 838 hours, which translates to 34.91 days, let's say 35, but the DATEDIFF give 40 and when you do yourself the calculation it is 40 days! 12th Jan to 21st Feb.
All other 21 results are correct.
Any idea why? A bug in mysql?
All responses are highly appreciated.
Use
TIMESTAMPDIFF(HOUR,`Time`, `Resolution`)
instead.
It also negates the need to use HOUR().
https://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_timestampdiff
The result returned by TIMEDIFF() is limited to the range allowed for TIME values. https://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_timediff
TIME values may range from -838:59:59 to 838:59:59. https://dev.mysql.com/doc/refman/5.5/en/time.html
So you're getting the maximum possible value.
I have written a query where I am adding one hour to a datetime which is present in database, and comparing that time to the present time based on minutes and hours.
Table structure of upgrades:
id| postid |type |status| counter| datetime | autoreposttime
1 | 139 | M | P | 1 | 2017-04-26 10:49:23 | 60
2 | 140 | M | P | 1 | 2017-04-26 10:49:27 | 60
3 | 141 | M | P | 1 | 2017-04-26 10:49:31 | 60
4 | 142 | M | P | 1 | 2017-04-26 10:49:34 | 60
Table structure of posts:
post_id | locationid | priority_time
81 | 1 | 2017-04-20 18:29:17
82 | 27 | 2017-04-20 18:29:19
85 | 27 | 2017-04-20 18:29:07
Here is my SQL query which I have written in where I want to retrieve rows where datetime + 1 hour is equal to present time.
$posts = DB::table('upgrades')
->join('posts','posts.post_id','=','upgrades.postid')
->where(DB::raw('DATE_FORMAT(DATE_ADD(`upgrades`.`datetime`, INTERVAL 1 HOUR),"%Y-%m-%d %H:%i")'),$datetime)
->select('posts.*','upgrades.*')->get();
I'm getting data as null, and I think there's some problem in the where condition. What is wrong with my query?
One way to do that is to use Carbon. If I understood you correctly, you want result for specified minute, so here's an example:
$time = Carbon::now()->subHour();
$posts = ....
->whereBetween('datetime', [$time->format('Y-m-d H:i:00'), $time->format('Y-m-d H:i:59'])
....
->get();
I'm creating a database (in MySQL) with a table of measurements. For each measurement I want to store the DateTime it came in. For showing plots within an app for different intervals (measurements of the day/week/month/year) I want sample the data points I have, so I can return e. g. 30 data points for the whole year as well as for the day/hour. This is the same as done with stock price graphs:
stock price plot for 1 day
vs
stock price plot for 1 month
As you can see, the amount of data points is the same in both pictures.
So how can I select x entries within a timespan in MySQL via SQL?
My data looks like this:
+====+====================+=============+==========+
| id | datetime | temperature | humidity |
+====+====================+=============+==========+
| 1 | 1-15-2016 00:30:00 | 20 | 40 |
+----+--------------------+-------------+----------+
| 2 | 1-15-2016 00:35:00 | 19 | 41 |
+----+--------------------+-------------+----------+
| 3 | 1-15-2016 00:40:00 | 20 | 40 |
+----+--------------------+-------------+----------+
| 4 | 1-15-2016 00:45:00 | 20 | 42 |
+----+--------------------+-------------+----------+
| 5 | 1-15-2016 00:50:00 | 21 | 42 |
+----+--------------------+-------------+----------+
| 6 | 1-15-2016 00:55:00 | 20 | 43 |
+----+--------------------+-------------+----------+
| 7 | 1-15-2016 01:00:00 | 21 | 43 |
+====+====================+=============+==========+
Let's say, I always want two data points (in reality a lot more). So for the last half hour I want the database to return data point 1 and 4, for the last ten minutes I want it to return 6 and 7.
Thanks for helping!
PS: I'm sorry for any errors in my English
OK, assuming a very simple systematic approach, you can get the first and last entry for any defined period:
select *
from table
where mydatetime =
(select
max(mydatetime)
from table
where mydatetime between '2017-03-01' and '2017-03-15'
)
OR mydatetime =
(select
min(mydatetime)
from table
where mydatetime between '2017-03-01' and '2017-03-15'
)
I believe your answer can be found at the following location:
https://stackoverflow.com/a/1891796/7176046
If you are looking to filter out any items not within your date/time your query would use:
Select * from table where Date/Time is (What you want to sort by)
I'd like to use GROUP BY multiple columns, I think it's best to start with an example:
SELECT
eventsviews.eventId,
showsActive.showId,
showsActive.venueId,
COUNT(*) AS count
FROM eventsviews
INNER JOIN events ON events.eventId = eventsviews.eventId
INNER JOIN showsActive ON showsActive.eventId = eventsviews.eventId
WHERE events.status = 1
GROUP BY showsActive.venueId, showsActive.showId, showsActive.eventId
ORDER BY count DESC
LIMIT 100;
Output:
| *eventId* | *showId* | *venueId* | *count* |
+-----------+----------+-----------+---------+
[...snip...]
| 95 | 92099 | 9770 | 32 |
| 95 | 105472 | 10702 | 32 |
| 3804 | 41225 | 8165 | 17 |
| 3804 | 41226 | 8165 | 17 |
| 923 | 2866 | 5451 | 14 |
| 923 | 20184 | 5930 | 14 |
[...snip...]
What I would like instead:
| *eventId* | *showId* | *venueId* | *count* |
+-----------+----------+-----------+---------+
| 95 | 92099 | 9770 | 32 |
| 3804 | 41226 | 8165 | 17 |
| 923 | 20184 | 5930 | 14 |
So, I want my data grouped by eventId, but only once for each showId and venueId ...
I actually have a SQL query that does that, but it has 8 subqueries and is as slow as a T-Ford ... And since this is executed on every page load, speeding things up looks like a good idea!
There are a few questions like this, and I've tried many different things, but I've been at this query for an hour and I can't seem to get it to work as I want :-(
Thanks!
You probably want either a min or a max on showid, and then not include it in the group by, I can't tell which because looking at your "prefered" resultset, you have both.
If you want your data grouped by eventId, group just by eventId and you'll get exactly the result you're looking for.
This is a MySQL feature (?) that it allows you to select non-aggregate columns, in which case it will return the first row available. In other DBMS it's achieved by DISTINCT ON, which is not available in MySQL.