Report Table
+----+-------------------+--------+---------------------+
| id | mac_address |quantity| zaman |
+----+-------------------+--------+---------------------+
| 12 | 26-C0-B7-1E-7A-8C | 001 | 2017-12-07 10:22:09 |
| 14 | 26-C0-B7-1E-7A-8C | 001 | 2017-12-07 10:28:44 |
| 15 | 26-C0-B7-1E-7A-8D | 001 | 2017-12-07 10:44:54 |
| 19 | 26-C0-B7-1E-7A-AC | 001 | 2017-12-08 10:11:00 |
| 20 | 26-C0-B7-1E-7A-AD | 002 | 2017-12-08 10:32:12 |
| 24 | 26-C0-B7-1E-7A-8D | 001 | 2017-12-09 10:29:54 |
| 25 | 26-C0-B7-1E-7A-8E | 002 | 2017-12-09 10:39:11 |
I want to find average of quantity between days according to this equation:
Sum of quantity(9)/Number of day(3) = 3
So far I have this query:
SELECT ROUND(AVG(quantity),2) AS quantity, DATE(zaman) as DateOnly
FROM report WHERE DATE(zaman) BETWEEN ? AND ?
GROUP BY DateOnly
How can I achieve this?
try using sum of the quantity divided by number of days
select sum(quantity) /( datediff(max(zaman), min(zaman))) as quantity
FROM report WHERE DATE(zaman) BETWEEN ? AND ?
Try this:
SELECT ROUND((SUM(Quantity)*1.0)/datediff(MAX(Zaman), MIN(Zaman)),0)
FROM report
WHERE zaman BETWEEN ? AND ?
Related
I have a simple table that used to store fuel issuing details for different vehicles as follows:
+----+------------+-----+---------------+-------------+
| id | vehicle_no | qty | meter_reading | date_issued |
+----+------------+-----+---------------+-------------+
| 1 | 366 | 50 | 10500 | 2019-09-01 |
| 2 | 366 | 50 | 11020 | 2019-09-02 |
| 3 | 367 | 25 | 25000 | 2019-09-03 |
| 4 | 366 | 50 | 11450 | 2019-09-04 |
| 5 | 368 | 50 | 6000 | 2019-09-05 |
+----+------------+-----+---------------+-------------+
02) Then I need to find no of Kilometers run against issued sum of fuel quantities.
03) I used the following query
select f1.vehicle_no, (select f1.meter_reading-f2.meter_reading)/sum(qty) from fuel f1) from fuel f2 group by vehicle_no
04) I want to get the desired output as follows :
As an example :
the meter reading of id=4 - meter reading of id=2 is 430 Kilometers
the meter reading of id=4 - meter reading of id=1 is 950 Kilometers
the meter reading of id=2 - meter reading of id=1 is 520 Kilometers
But I did not get the expected result. Can anyone help me ?
With a self join:
select
f.id,
ff.id,
f.vehicle_no,
f.date_issued,
ff.date_issued,
f.meter_reading - ff.meter_reading as dif
from fuel f inner join fuel ff
on ff.vehicle_no = f.vehicle_no and ff.date_issued < f.date_issued
See the demo.
Results:
> id | id | vehicle_no | date_issued | date_issued | dif
> -: | -: | ---------: | :------------------ | :------------------ | --:
> 2 | 1 | 366 | 2019-09-02 00:00:00 | 2019-09-01 00:00:00 | 520
> 4 | 1 | 366 | 2019-09-04 00:00:00 | 2019-09-01 00:00:00 | 950
> 4 | 2 | 366 | 2019-09-04 00:00:00 | 2019-09-02 00:00:00 | 430
I have table in mysql like
| service_code | charges | caller_number | duration | minutes |
+--------------+---------+---------------+----------+---------+
| 10 | 15 | 8281490235 | 00:00:00 | 1.0000 |
| 11 | 12 | 9961621709 | 00:00:00 | 0.0000 |
| 10 | 15 | 8281490235 | 01:00:44 | 60.7333 |
| 11 | 2 | 9744944316 | 01:00:44 | 60.7333 |
+--------------+---------+---------------+----------+---------+
from this table I want to get charges*minutes for each separate caller_number.
I have done like this
SELECT sum(charges*minutes) as cost from t8_m4_bill groupby caller_number
but I am not getting expected output. Please help?
SELECT caller_number,sum(charges*minutes) as cost
from t8_m4_bill
group by caller_number
order by caller_number
I have a table named nca_totals.
Table: nca_totals
+----------+-----------+------------+--------------+
| total_id | nca_total | nca_date | account_type |
+----------+-----------+------------+--------------+
| 13 | 10450 | 2015-01-21 | DBP-TRUST |
| 14 | 5000 | 2015-02-05 | DBP-TRUST |
| 15 | 7000 | 2015-04-02 | DBP-TRUST |
| 16 | 4000 | 2015-05-02 | DBP-TRUST |
+----------+-----------+------------+--------------+
Now I want to display all the data by quarter base on its date. Let's say I want to display all the records who belong to 1st Quarter like this:
+----------+-----------+------------+--------------+
| total_id | nca_total | nca_date | account_type |
+----------+-----------+------------+--------------+
| 13 | 10450 | 2015-01-21 | DBP-TRUST |
| 14 | 5000 | 2015-02-05 | DBP-TRUST |
+----------+-----------+------------+--------------+
This date belongs to the 1st quarter of the year (Jan, Feb, March). I only have this query to select the date and return its quarter number as:
SELECT QUARTER('2015-01-11'); /* returns 1 */
How can I combine that query to display all the records by quarter ? Can anyone help ? Thanks.
select *
from nca_totals
where QUARTER(nca_date) = 1
SELECT
CEIL(MONTH(`nca_date`) / 3) AS `quarter`
FROM `nca_totals`;
Consider this excerpt of our Users table:
+-------------+---------------------+---------------------+
| id | last_login | created |
+-------------+---------------------+---------------------+
| 14551578822 | 2014-02-22 17:38:39 | 2013-03-26 23:30:50 |
| 18442388426 | 0000-00-00 00:00:00 | 2013-11-07 15:51:11 |
| 49983341634 | 2014-03-06 22:28:47 | 2013-03-23 16:00:05 |
| 9527246957 | 2014-01-17 02:37:53 | 2013-05-14 02:14:49 |
| 58667409337 | 2014-03-08 06:54:01 | 2013-05-15 01:52:23 |
| 1907780002 | 2014-03-01 03:24:04 | 2013-05-01 07:57:56 |
| 65319490251 | 2014-03-19 05:49:41 | 2013-03-23 08:53:43 |
| 23896465717 | 0000-00-00 00:00:00 | 2012-10-21 10:52:23 |
| 19147401900 | 0000-00-00 00:00:00 | 2013-05-01 17:43:28 |
| 28598429318 | 0000-00-00 00:00:00 | 2014-03-14 14:44:15 |
+-------------+---------------------+---------------------+
We have many, many users - and we would like to generate a report that will display the total number of users we have as the date increases. We would like output similar to this:
+---------+---------------+
| DATE | User Count |
+---------+---------------+
| 2012-08 | 122 |
| 2012-09 | 1746 |
| 2012-10 | 3847 |
| 2012-11 | 5826 |
...
| 2014-03 | 472647 |
| 2014-04 | 497286 |
+---------+---------------+
There must be some way to do it without subselects and all kinds of messiness like that. I have a table already that displays the number of joins per period by the following query:
SELECT DATE(users.created) as JOIN_DATE , COUNT(users.id) AS JOIN_COUNT from users
WHERE users.created > '2012-07-01 00:00:00'
GROUP BY JOIN_DATE
ORDER BY JOIN_DATE ASC
Just wondered if there was a way to do it something like that.
Thanks!
You can use a variable to sum up the population foreach iteration
SELECT t.date ,
#population := #population+t.per_time population
FROM (
SELECT
DATE_FORMAT(`last_login` ,'%Y-%m') `date`,
COUNT(*) per_time
FROM Table1
WHERE created > '2012-07-01 00:00:00'
GROUP BY `date` ) t ,
(SELECT #population:=0) p
Fiddle Demo
From an example taken from here , I'm trying to understand what does GROUP BY do exactly :
Given this employee table :
+-------+----------+--------+------------+
| Empid | Empname | Salary | DOB |
+-------+----------+--------+------------+
| 1 | Habib | 2014 | 2004-12-02 |
| 2 | Karan | 4021 | 2003-04-11 |
| 3 | Samia | 22 | 2008-02-23 |
| 4 | Hui Ling | 25 | 2008-10-15 |
| 5 | Yumie | 29 | 1999-01-26 |
+-------+----------+--------+------------+
After executing mysql> select * from employee group by empname;
We get :
+-------+----------+--------+------------+
| Empid | Empname | Salary | DOB |
+-------+----------+--------+------------+
| 1 | Habib | 2014 | 2004-12-02 |
| 4 | Hui Ling | 25 | 2008-10-15 |
| 2 | Karan | 4021 | 2003-04-11 |
| 3 | Samia | 22 | 2008-02-23 |
| 5 | Yumie | 29 | 1999-01-26 |
+-------+----------+--------+------------+
So , does that mean that GROUP BY just sorts a table by key ?
Thanks
GROUP BY enables summaries. Specifically, it controls the use of summary functions like COUNT(), SUM(), AVG(), MIN(), MAX() etc. There isn't much to summarize in your example.
But, suppose you had a Deptname column. Then you could issue this query and get the average salary by Deptname.
SELECT AVG(Salary) Average,
Deptname
FROM Employee
GROUP BY Deptname
ORDER BY Deptname
If you want your result set put in a certain order, use ORDER BY.