I am creating a temp table which currently pulls values in for today and yesterday. The temp table looks like this:
|DateTime |company 1 |company 2 |
+------------------------+----------------------+
|2013-10-03 14:40:00 | 182475 | 110271 |
|2013-10-02 14:10:00 | 182086 | 110261 |
What I need to do is select the values from today, as well as the difference between today and yesterday. Based on the above data, the output would look like this:
Company 1 | Company 1 difference | Company 2| Company 2 difference
+-----------+----------------------+----------+--------------------------
182475 | 389 | 110271 | 10
I can't figure out how to specify which row to subtract from which, since there is no auto-increment field and the DateTime field will be slightly different each day.
Thanks for the help!
SELECT today.DateTime as DateTime
, today.Company1, today.Company1 - COALESCE(yesterday.Company1,0) AS Company1Diff
, today.Company2, today.Company2 - COALESCE(yesterday.Company2,0) AS Company2Diff
FROM tbl AS today
LEFT JOIN tbl AS yesterday
ON DATEDIFF(today.DateTime, yesterday.DateTime) = 1
ORDER BY today.DateTime ASC
Related
I have a MySQL table named rbsess with columns RBSessID (key), ClientID (int), RBUnitID (int), RentAmt (fixed-point int), RBSessStart (DateTime), and PrevID (int, references to RBSessID).
It's not transactional or linked. What it does track when a client was moved into a room and what the rent at the time of move in was. The query to find what the rent was for a particular client on a particular date is:
SET #DT='Desired date/time'
SET #ClientID=Desired client id
SELECT a.RBSessID
, a.ClientID
, a.RBUnitID
, a.RentAmt
, a.RBSessStart
, b.RBSessStart AS RBSessEnd
, a.PrevID
FROM rbsess a
LEFT
JOIN rbsess b
ON b.PrevID=a.RBSessID
WHERE a.ClientID=#ClientID
AND (a.RBSessStart<=#DT OR a.RBSessStart IS NULL)
AND (b.RBSessStart>#DT OR b.RBSessStart IS NULL);
This will output something like:
+----------+----------+----------+---------+---------------------+-----------+--------+
| RBSessID | ClientID | RBUnitID | RentAmt | RBSessStart | RBSessEnd | PrevID |
+----------+----------+----------+---------+---------------------+-----------+--------+
| 2 | 4 | 1 | 57500 | 2020-11-22 00:00:00 | NULL | 1 |
+----------+----------+----------+---------+---------------------+-----------+--------+
I also have
SELECT * FROM rbsess WHERE rbsess.ClientID=#ClientID AND rbsess.PrevID IS NULL; //for finding the first move in date
SELECT TIMESTAMPDIFF(DAY,#DT,LAST_DAY(#DT)) AS CountDays; //for finding the number of days until the end of the month
SELECT DAY(LAST_DAY(#DT)) AS MaxDays; //for finding the number of days in the month
SELECT (TIMESTAMPDIFF(DAY,#DT,LAST_DAY(#DT))+1)/DAY(LAST_DAY(#DT)) AS ProRateRatio; //for finding the ratio to calculate the pro-rated rent for the move-in month
SELECT ROUND(40000*(SELECT (TIMESTAMPDIFF(DAY,#DT,LAST_DAY(#DT))+1)/DAY(LAST_DAY(#DT)) AS ProRateRatio)) AS ProRatedRent; //for finding a pro-rated rent amount based on a rent amount.
I'm having trouble putting all of these together to form a single query that can output pro-rated and full rent amounts based on a start date and an optional end date all rent owed amounts in a single statement for each month in the period. I can add a payments table received and integrate it afterwards, just having a hard time with this seemingly simple real-world concept in a MySQL query. I'm using php with a MySQL back end. Temporary tables as intermediary queries are more than acceptable.
Even a nudge would be helpful. I'm not super-experienced with MySQL queries, just your basic CREATE, SELECT, INSERT, DROP, and UPDATE.
Examples as requested by GMB:
//Example data in rbsess table:
+----------+----------+----------+---------+---------------------+--------+
| RBSessID | ClientID | RBUnitID | RentAmt | RBSessStart | PrevID |
+----------+----------+----------+---------+---------------------+--------+
| 1 | 4 | 1 | 40000 | 2020-10-22 00:00:00 | NULL |
| 2 | 4 | 1 | 57500 | 2020-11-22 00:00:00 | 1 |
| 3 | 2 | 5 | 40000 | 2020-11-29 00:00:00 | NULL |
+----------+----------+----------+---------+---------------------+--------+
Expected results would be a list of the rent amounts owed for every month, including pro-rated amounts for partial occupancy in a month, from a date range of months. For example for the example data above for a date range spanning all of the year of 2020 from client with ClientID=4 the query would produce an amount for each month within the range similar to:
Month | Amt
2020-10-1 | 12903
2020-11-1 | 45834
2020-12-1 | 57500
I'm trying to add a column to a production hours dataset that will tell if a provider who worked last week was also working three weeks earlier. The current dataset looks something like this:
RowID | ProviderID | ClientID | DOS | DOS (Week) | Hours
1 | 1111111111 | 22222222 | 11/2/2020 | 11/1/2020 | 2.5
2 | 1111111111 | 33333333 | 11/5/2020 | 11/1/2020 | 1
3 | 1111111111 | 44444444 | 10/13/2020 | 10/11/2020 | 3
I'm trying to get an extra column 'Active 3 Weeks Prior' with y/n or 1/0 for values. For the above table, let's assume the provider started on 10/13/20. The new column would ideally populate like this:
RowID | ProviderID | ClientID | DOS | DOS (Week) | Hours | Active 3 weeks Prior
1 | 1111111111 | 22222222 | 11/2/2020 | 11/1/2020 | 2.5 | Yes
2 | 1111111111 | 33333333 | 11/5/2020 | 11/1/2020 | 1 | Yes
3 | 1111111111 | 44444444 | 10/13/2020 | 10/11/2020 | 3 | No
A couple extra tidbits: our org uses Sunday as the start of the week so DOS (Week) is the Sunday prior to the date of service. From what I've been reading so far, it seems like the solution here is some kind of self join, where the base production records are aggregated into weekly hours and compared with that same providerID's records for DOS (Week) - 21.
The trouble I'm having is: whether I'm on the right track in the first place with the self-join and how I would generate the y/n values based on the success or failure to find a matching value. Also, I suspect that joining based on a concatenate of ProviderID and DOS(Week) might be flawed? This is what I've been playing with so far.
Please let me know if I can clarify the question at all or am missing something very obvious. I truly appreciate any help, as I've been trying to figure out the right search terms to get a clue on the answer for a few days now.
If you are running MySQL 8.0, you can use window functions and a range specification:
select t.*,
(
max(providerid) over(
partition by providerid
order by dos
range between interval 3 week preceding and interval 3 week preceding
) is not null
) as active_3_weeks_before
from mytable t
It is not really clear from your explanation and data what you mean by was also working three weeks earlier. What the query does is, for each row, to check if another row exists with the same supplier and a dos that is exactly 3 week before the dos of the current row. This can easily be adapted for some other requirement.
Edit: if you want to check for any record within the last 3 weeks, you would change the window range to:
range between interval 3 week preceding and interval 1 day preceding
And if you want this in MySQL < 8.0, where window functions are not available, then you would use a correlated subquery:
select t.*,
exists (
select 1
from mytable t1
where
t1.providerid = t.provider_id
and t1.dos >= t.dos - interval 3 week
and t1.dos < t.dos
) as active_3_weeks_before
from mytable t
I have a question about some mysql code.
I have a table referencing some employees with the date of arrival et the project id. I wanna calculate all the entries in the enterprise and group it by week.
A this moment, I can have this result
Project ID | Week | Count
1 | 2019-S01 | 2
1 | 2019-S03 | 1
2 | 2019-S01 | 1
2 | 2019-S04 | 5
2 | 2019-S05 | 3
2 | 2019-S06 | 2
This is good, but I would like to have all the weeks returned, even if a week has 0 as result :
Project ID | Week | Count
1 | 2019-S01 | 2
1 | 2019-S02 | 0
1 | 2019-S03 | 1
...
2 | 2019-S01 | 1
2 | 2019-S02 | 0
2 | 2019-S03 | 0
2 | 2019-S04 | 5
2 | 2019-S05 | 3
2 | 2019-S06 | 2
...
Here is my actual code :
SELECT
AP.SECTION_ANALYTIQUE AS SECTION,
FS_GET_FORMAT_SEMAINE(AP.DATE_ARRIVEE_PROJET) AS SEMAINE,
Count(*) AS COMPTE
FROM
RT00_AFFECTATIONS_PREV AP
WHERE
(AP.DATE_ARRIVEE_PROJET <= CURDATE() AND Year(AP.DATE_ARRIVEE_PROJET) >= Year(CURDATE()))
GROUP BY
SECTION, SEMAINE
ORDER BY
SECTION
Does anybody have a solution ?
I searched things on internet but didn't find anything accurate :(
Thank you in advance ! :)
The classic way to meet this requirement is to create a referential table to store all possible weeks.
create table all_weeks(week varchar(8) primary key);
insert into all_weeks values
('2019-S01'), ('2019-S02'), ('2019-S03'), ('2019-S04'), ('2019-S05'), ('2019-S06');
Once this is done, you can generate a cartesian product of all possible sections and weeks with a CROSS JOIN, and LEFT JOIN that with the original table.
Given your code snippet, this should look like:
SELECT
s.section_analytique AS section,
w.week AS semaine,
COUNT(ap.section_analytique) AS compte
FROM
(SELECT DISTINCT section_analytique from rt00_affectations_prev) s
CROSS JOIN all_weeks w
LEFT JOIN rt00_affectations_prev ap
ON s.section_analytique = ap.section_analytique AND w.week = FS_GET_FORMAT_SEMAINE(ap.date_arrivee_projet)
GROUP BY s.section_analytique, w.week
ORDER BY s.section_analytique
PS: be careful not to put conditions on the original table in the WHERE clause: this would defeat the purpose of the LEFT JOIN. If you need to do some filtering, use the referential table instead (you might need to add a few columns to it, like the starting date of the week maybe).
I have this table (have a look on SQLFiddle)
In previous steps the record number has been determined and the values for "PrevVal" and "NewVal" have been calculated.
The record's end value ("NewVal"), becomes the next record's starting value ("PrevVal")
I would like to condense the table in such a way that there is only one record per day, containing:
the date starting value "StartOfDay",
the total change during the day "TotalChange" and
the resulting day-end value "EndOfDay"
The desired result can be seen in the demo table "ChangesPerDayCondensed"
Who can help me solve this (a stored procedure is OK).
Thnx
I am a little confused whey the record numbers are going the opposite way. But neverthless you could solve this by evaluating the starting value and sum of mutations separatately and then adding them all to come up with ending value..
Ordering the results descending as the record number again needs to be lower for a higher date.
insert into ChangesPerDayCondensed
select #recrd:=#recrd+1, a.MyDate, b.PrevVal, a.Mutation, b.PrevVal+a.Mutation
from
(select MyDate, sum(Mutation) as Mutation from MutationsPerDay group by MyDate) a,
(select b.MyDate, b.PrevVal from (select MyDate, max(RecNo) as RecNo from MutationsPerDay group by MyDate) a, MutationsPerDay b where a.RecNo = b.RecNo) b,
(select #recrd:=0) c
where a.MyDate = b.MyDate order by MyDate desc;
I'd do it this way:
First create a lookup for each day (find first and lasts ReqNo) and then join two times to the Daily table and calculate the changes:
SELECT first_.MyDate,
first_.PrevVal AS StartOfDay,
last_.NewVal AS EndOfDay,
(last_.NewVal - first_.PrevVal) AS TotalChange
FROM
(SELECT mpd1.MyDate,
max(mpd1.RecNo) AS first_rec_no,
min(mpd1.RecNo) AS last_rec_no
FROM MutationsPerDay mpd1
GROUP BY MyDate) AS lo
JOIN MutationsPerDay AS first_ ON lo.first_rec_no = first_.RecNo
JOIN MutationsPerDay AS last_ ON lo.last_rec_no = last_.RecNo
Explanation:
What you actually want is:
For every day the first and the last value (and the difference).
So what you need to find first is for every date the id of the first and the last value:
SELECT mpd1.MyDate,
max(mpd1.RecNo) AS first_rec_no,
min(mpd1.RecNo) AS last_rec_no
FROM MutationsPerDay mpd1
GROUP BY MyDate
----------------------------------------------------
| MyDate | first_rec_no | last_rec_no |
----------------------------------------------------
| 2016-12-05 00:00:00 | 16 | 13 |
| 2016-12-07 00:00:00 | 12 | 12 |
| 2016-12-12 00:00:00 | 11 | 8 |
| 2016-12-14 00:00:00 | 7 | 7 |
| 2016-12-20 00:00:00 | 6 | 6 |
| 2016-12-21 00:00:00 | 5 | 4 |
| 2016-12-28 00:00:00 | 3 | 3 |
| 2016-12-29 00:00:00 | 2 | 2 |
| 2016-12-30 00:00:00 | 1 | 1 |
----------------------------------------------------
Then you can use these first and last id's to find the corresponding values in the source table. For example for the 2016-12-21 you'd get the rows with the id's first: 5 and last: 4
The PrevVal record no 5 represents the first value you have seen at this day and NewVal in record no 4 represents the last value you have seen at this day. If you subtract them you'll get the change for this day.
I hope this clarifies the methodology a bit.
Thanks for taking a look at this question. I'm kind of lost and hope someone can help me. Below is a update query i would like to run.
This query now returns an error:
1054 - Unknown column 'spi.et_cross_rank' in 'where clause'
Some background:
from table: tmp_ranking_tbl
I would like to get the nth(spi.et_return_rank) record
for a group with value x (spi.et_cross_rank)
SET #rownum=0;
UPDATE STRToer_Poule_indeling spi
SET spi.team_id = (SELECT R.team_poule_id
FROM (SELECT #rownum:=#rownum+1 AS rownum, trt.team_poule_id
FROM tmp_ranking_tbl trt
WHERE trt.overal_rank = spi.et_cross_rank
ORDER BY trt.punten DESC, (trt.goals_voor - trt.goals_tegen) DESC, trt.goals_voor DESC) R
WHERE R.rownum = spi.et_return_rank)
WHERE spi.et_ronde = v_et_ronde
AND spi.poule_id IN (SELECT row_id FROM STRToer_Poules WHERE toernooi_onderdeel_id=v_onderdeel_id) ;
Data in tmp_ranking_tbl looks like:
team_poule_id | punten | goals_voor | goals_tegen | overal_rank
65 | 6 | 10 | 10 | 2
69 | 6 | 9 | 10 | 2
75 | 7 | 11 | 4 | 2
84 | 6 | 6 | 8 | 2
112 | 5 | 7 | 7 | 2
Thanks in advance for the help!
Update after question in comment about the goal, i'll try to keep it short. :-)
This query is used on a website to keep scores of a tournament. Sometimes you have an odd number of teams going to the next round. At that point I want to select the best number 3(spi.et_cross_rank) team across poules. This is setting saved in the STRToer_Poule_indeling with what rank per poule and the 1st, 2nd or nth team(spi.et_return_rank). The table tmp_ranking_tbl is filled with all rank 3 teams across the poules. When this if filled I would like the 1st or 2nd, depedining on the setting in STRToer_Poule_indeling, record to return.
Subset of structure the STRToer_Poule_indeling table
row_id | team_id | et_ronde | et_cross_rank | et_return_rank
1 | null | 1 | 3 | 1
Just check if you have a column named et_cross_rank on your table STRToer_Poule_indeling
The problem seems to be that SQL can't find that column on your table.
Hope it helps.