im looking for solutions to my problem.
i have a query
select em_name, sum(abs_day_left)
from pp_employees,
pp_types_abs,
pp_abs
where em_id = abs_em_id and abs_abs_id = abs_id and
abs_kod in ('12','13','14','15')
group by em_name
i want to make more columns with another abs_kod number (image attachment)
for example
second column
... abs_kod in
('656','44','323','33')
third column
... abs_kod in
('63','55','565','556')
and more..
example table
thanks for help and nice weekend
One more thing...
the formula counts days from the whole month
how to make it count correctly the days when it sets the parameters for the half month, for example from 1980-01-01 to 1980-03-15
thanks in advance
bob
I think that you are looking for conditional aggregation:
select
em_name,
sum(case when abs_kod in (12,13,14,15) then abs_day_left end) abs_day_left_1,
sum(case when abs_kod in (656,44,323,33) then abs_day_left end) abs_day_left_2,
sum(case when abs_kod in (63,55,565,556) then abs_day_left end) abs_day_left_3
from pp_employees
inner join pp_abs on em_id = abs_em_id
inner join pp_types_abs on abs_abs_id = abs_id
where and abs_kod in (12,13,14,15,656,44,323,33,63,55,565,556)
group by em_name
Notes:
always use explicit joins instead of old-shool, implicit joins - I tried to fix this but I am unsure I did it correctly, for a reason that lies in the following point...
always qualify the columns in the query with the table they belong to
Related
I have the following tables below and their schema:
INV
id, product code, name, ucost, tcost, desc, type, qoh
1,123,CPASS 700,1.00,5.00,CPASS 700 Lorem, COM,5
2,456,Shelf 5,2.00,6.00,Shelf 5 KJ, BR,3
GRP
id,type,desc
1,COM,COMPASS
2,BR,SHELF
Currently I have a query like this:
SELECT INV.*,GRP.DESCR AS CATEGORY
FROM INV LEFT JOIN GRP ON INV.TYPE = GRP.TYPE
WHERE INV.QOH = 0
There is no problems with that query.
Right now,I want to know the SUM of the TCOST of every INV record where their QOH is 0.
In this situation, does that I mean all I have to do is to write a separate query like the one below:
SELECT SUM(TCOST)
FROM INV
WHERE QOH = 0
Does it make any sense for me to try and combine those two queries as one ?
First understand that SUM is the aggregate function hence either you can run the Query like
(SELECT SUM(TCOST) FROM INV WHERE QOH=0) as total
This will return Sum of TCOST in INV Table for mentioned condition.
Another approach is finding the Sum based on the some column (e.g. Type)
you could write query like
SELECT Type , SUM(TCOST) FROM INV WHERE QOH=0 GROUP BY type ;
Its not clear on what criteria you want to sum . But I think above two approaches would provide you fare idea .
Mmm, you could maybe use a correlated query, though i'm not sure it's the best approach since I'm not sure I understand what your attempting to do:
SELECT INV.*,
GRP.DESCR AS CATEGORY ,
(SELECT SUM(TCOST) FROM INV WHERE QOH=0) as your_sum
FROM INV LEFT JOIN GRP ON INV.TYPE = GRP.TYPE
WHERE INV.QOH = 0
If you want only one value for the sum(), then your query is fine. If you want a new column with the sum, then use window functions:
SELECT INV.*, GRP.DESCR AS CATEGORY,
SUM(INV.TCOST) OVER () as sum_at_zero
FROM INV LEFT JOIN
GRP
ON INV.TYPE = GRP.TYPE
WHERE INV.QOH = 0;
It does not make sense to combine the queries by adding a row to the first one, because the columns are very different. A SQL result set requires that all rows have the same columns.
So this is the requirement I need to meet:
Aggregated data of all the schools in the ESD, grouped by
SchoolDistrict.SchoolDistrictID
(get the same data as the school district scenario above, then add grouping by district, filtered to
EducationServiceDistrict. EducationServiceDistrictID
)
Also calculate percentage of pass, fail, and untested
How do I calculate the percentage pass, fail, and untested?
This is the query I have written so far.
CREATE VIEW district_map AS
SELECT * and SchoolDistrictID,
EducationServiceDistrict
FROM SchoolDistrict_View
and SchoolDistrict,
EducationServiceDistrict
GROUP BY EducationServiceDistrict.EducationServiceDistrictID
ORDER BYLeadWaterTestLocation.PassFail
This is the general idea of how these problems are solved - if you understand this simplified version you will be able to solve your problem.
select d.districtName,
s.studentCount,
case when s.studentCount=0 then 0 else s.passed / s.studentCount * 100 end as PassedPct
from district d
join (select districtId,
sum(studentCount) as studentCount,
sum(passed) as passed
from schools
group by districtId) as s
on d.districtId = s.districtId
order by d.districtName
My query below is doubling the amount on the last record it returns. I have 3 tables - activities, bookings and tempbookings. The query needs to list the activities and attached information and pull the total number (using the SUM) of places booked (as BookingTotal) from the booking table by each activity and then it needs to calculate the same for tempbookings (as tempPlacesReserved) providing the reservedate field inside that table is in the future.
However the first issue is that if there are no records for an activity in the tempbookings table it does not return any records for that activity at all, to get around this i created dummy records in the past so that it still returns the record, but if I can make it so I don't have to do this I would prefer it!
The main issue I have is that on the final record of the returned results it doubles the booking total and the places reserved which of course makes the whole query useless.
I know that I am doing something wrong I just haven't been able to sort it, I have searched similar issues online but am unable to apply them to my situation correctly.
Any help would be appreciated.
P.S. I'm aware that normally you wouldn't need to fully label all the paths to the databases, tables and fields as I have but for the program I am planning to use it in I have to do it this way.
Code:
SELECT [LeisureActivities].[dbo].[activities].[activityID],
[LeisureActivities].[dbo].[activities].[activityName],
[LeisureActivities].[dbo].[activities].[activityDate],
[LeisureActivities].[dbo].[activities].[activityPlaces],
[LeisureActivities].[dbo].[activities].[activityPrice],
SUM([LeisureActivities].[dbo].[bookings].[bookingPlaces]) AS 'bookingTotal',
SUM (CASE WHEN[LeisureActivities].[dbo].[tempbookings].[tempReserveDate] > GetDate() THEN [LeisureActivities].[dbo].[tempbookings].[tempPlaces] ELSE 0 end) AS 'tempPlacesReserved'
FROM [LeisureActivities].[dbo].[activities],
[LeisureActivities].[dbo].[bookings],
[LeisureActivities].[dbo].[tempbookings]
WHERE ([LeisureActivities].[dbo].[activities].[activityID]=[LeisureActivities].[dbo].[bookings].[activityID]
AND [LeisureActivities].[dbo].[activities].[activityID]=[LeisureActivities].[dbo].[tempbookings].[tempActivityID])
AND [LeisureActivities].[dbo].[activities].[activityDate] > GetDate ()
GROUP BY [LeisureActivities].[dbo].[activities].[activityID],
[LeisureActivities].[dbo].[activities].[activityName],
[LeisureActivities].[dbo].[activities].[activityDate],
[LeisureActivities].[dbo].[activities].[activityPlaces],
[LeisureActivities].[dbo].[activities].[activityPrice];
Your current query is using an INNER JOIN between each of the tables so if the tempBookings table has no records, you will not return anything.
I would advise that you start to use JOIN syntax. You might also need to use subqueries to get the totals.
SELECT a.[activityID],
a.[activityName],
a.[activityDate],
a.[activityPlaces],
a.[activityPrice],
coalesce(b.bookingTotal, 0) bookingTotal,
coalesce(t.tempPlacesReserved, 0) tempPlacesReserved
FROM [LeisureActivities].[dbo].[activities] a
LEFT JOIN
(
select activityID,
SUM([bookingPlaces]) AS bookingTotal
from [LeisureActivities].[dbo].[bookings]
group by activityID
) b
ON a.[activityID]=b.[activityID]
LEFT JOIN
(
select tempActivityID,
SUM(CASE WHEN [tempReserveDate] > GetDate() THEN [tempPlaces] ELSE 0 end) AS tempPlacesReserved
from [LeisureActivities].[dbo].[tempbookings]
group by tempActivityID
) t
ON a.[activityID]=t.[tempActivityID]
WHERE a.[activityDate] > GetDate();
Note: I am using aliases because it is easier to read
Use new SQL-92 Join syntax, and make join to tempBookings an outer join. Also clean up your sql with table aliases. Makes it easier to read. As to why last row has doubled values, I don't know, but on off chance that it is caused by extra dummy records you entered. get rid of them. That problem is fixed by using outer join to tempBookings. The other possibility is that the join conditions you had to the tempBookings table(t.tempActivityID = a.activityID) is insufficient to guarantee that it will match to only one record in activities table... If, for example, it matches to two records in activities, then the rows from Tempbookings would be repeated twice in the output, (causing the sum to be doubled)
SELECT a.activityID, a.activityName, a.activityDate,
a.activityPlaces, a.activityPrice,
SUM(b.bookingPlaces) bookingTotal,
SUM (CASE WHEN t.tempReserveDate > GetDate()
THEN t.tempPlaces ELSE 0 end) tempPlacesReserved
FROM LeisureActivities.dbo.activities a
Join LeisureActivities.dbo.bookings b
On b.activityID = a.activityID
Left Join LeisureActivities.dbo.tempbookings t
On t.tempActivityID = a.activityID
WHERE a.activityDate > GetDate ()
GROUP BY a.activityID, a.activityName,
a.activityDate, a.activityPlaces,
a.activityPrice;
I have to provide counts for different activities, some of the columns are from some table but few I have to take by joining other tables. And in the last column I have to add counts *of 5 columns togather in one field*.Please see my query below and advice the best way to achieve my results :)
SELECT web. OID,web. MARKETING_GROUP,
SUM(DECODE(WEB.EVENT_TYPE,5,WEB.ACTIVITY_COUNT,0)) AS DISCUSSIONCOMMENT ,
SUM(DECODE(WEB.EVENT_TYPE,6,WEB.ACTIVITY_COUNT,0)) AS DISCUSSIONSTART ,
SUM(DECODE(WEB.EVENT_TYPE,7,WEB.ACTIVITY_COUNT,0)) AS DISCUSSIONVIEW,
SUM(case when o.when _clicked is not null then c(*))AS clickcount,
**SUM(case when WEB.EVENT_TYPE in(5,6,7,8)then WEB.ACTIVITY_COUNT +c.count(*))as Total** --------- This is where I am getting stuck and confused???
from GMMI_AIR.WEB_ACTIVITY_FCT WEB join GMMI_AIR.COUPON_WEB_ACTIVITY C
on WEB.OID_WEB_ACTIVITY_FCT = C.OID_COUPON_WEB_ACTIVITY
I am really stuck as the table which is joined doesn'thave field named activity_count or activity_type so to see the counts I can only do count(*) but to add it all other fileds in one column and sum it up is very confusing??
Any help??/
SELECT web. OID,web. MARKETING_GROUP,
SUM(DECODE(WEB.EVENT_TYPE,5,WEB.ACTIVITY_COUNT,0)) AS DISCUSSIONCOMMENT ,
SUM(DECODE(WEB.EVENT_TYPE,6,WEB.ACTIVITY_COUNT,0)) AS DISCUSSIONSTART ,
SUM(DECODE(WEB.EVENT_TYPE,7,WEB.ACTIVITY_COUNT,0)) AS DISCUSSIONVIEW,
SUM(case when o.when _clicked is not null then c(*))AS clickcount,
SUM(case when WEB.EVENT_TYPE in(5,6,7,8)then WEB.ACTIVITY_COUNT END) +c.count(*) as Total
from GMMI_AIR.WEB_ACTIVITY_FCT WEB join GMMI_AIR.COUPON_WEB_ACTIVITY C
on WEB.OID_WEB_ACTIVITY_FCT = C.OID_COUPON_WEB_ACTIVITY
GROUP BY web. OID,web. MARKETING_GROUP;
So I decided to try out PostgreSQL instead of MySQL but I am having some slight conversion problems. This was a query of mine that samples data from four tables and spit them out all in on result.
I am at a loss of how to convey this in PostgreSQL and specifically in Django but I am leaving that for another quesiton so bonus points if you can Django-fy it but no worries if you just pure SQL it.
SELECT links.id, links.created, links.url, links.title, user.username, category.title, SUM(votes.karma_delta) AS karma, SUM(IF(votes.user_id = 1, votes.karma_delta, 0)) AS user_vote
FROM links
LEFT OUTER JOIN `users` `user` ON (`links`.`user_id`=`user`.`id`)
LEFT OUTER JOIN `categories` `category` ON (`links`.`category_id`=`category`.`id`)
LEFT OUTER JOIN `votes` `votes` ON (`votes`.`link_id`=`links`.`id`)
WHERE (links.id = votes.link_id)
GROUP BY votes.link_id
ORDER BY (SUM(votes.karma_delta) - 1) / POW((TIMESTAMPDIFF(HOUR, links.created, NOW()) + 2), 1.5) DESC
LIMIT 20
The IF in the select was where my first troubles began. Seems it's an IF true/false THEN stuff ELSE other stuff END IF yet I can't get the syntax right. I tried to use Navicat's SQL builder but it constantly wanted me to place everything I had selected into the GROUP BY and that I think it all kinds of wrong.
What I am looking for in summary is to make this MySQL query work in PostreSQL. Thank you.
Current Progress
Just want to thank everybody for their help. This is what I have so far:
SELECT links_link.id, links_link.created, links_link.url, links_link.title, links_category.title, SUM(links_vote.karma_delta) AS karma, SUM(CASE WHEN links_vote.user_id = 1 THEN links_vote.karma_delta ELSE 0 END) AS user_vote
FROM links_link
LEFT OUTER JOIN auth_user ON (links_link.user_id = auth_user.id)
LEFT OUTER JOIN links_category ON (links_link.category_id = links_category.id)
LEFT OUTER JOIN links_vote ON (links_vote.link_id = links_link.id)
WHERE (links_link.id = links_vote.link_id)
GROUP BY links_link.id, links_link.created, links_link.url, links_link.title, links_category.title
ORDER BY links_link.created DESC
LIMIT 20
I had to make some table name changes and I am still working on my ORDER BY so till then we're just gonna cop out. Thanks again!
Have a look at this link GROUP BY
When GROUP BY is present, it is not
valid for the SELECT list expressions
to refer to ungrouped columns except
within aggregate functions, since
there would be more than one possible
value to return for an ungrouped
column.
You need to include all the select columns in the group by that are not part of the aggregate functions.
A few things:
Drop the backticks
Use a CASE statement instead of IF() CASE WHEN votes.use_id = 1 THEN votes.karma_delta ELSE 0 END
Change your timestampdiff to DATE_TRUNC('hour', now()) - DATE_TRUNC('hour', links.created) (you will need to then count the number of hours in the resulting interval. It would be much easier to compare timestamps)
Fix your GROUP BY and ORDER BY
Try to replace the IF with a case;
SUM(CASE WHEN votes.user_id = 1 THEN votes.karma_delta ELSE 0 END)
You also have to explicitly name every column or calculated column you use in the GROUP BY clause.