I am trying to get this query for a database question( Unlucky wmployees) to Postgres. I am having a hard time getting it right
CREATE PROCEDURE unluckyEmployees()
BEGIN
SET #rn =0;
SELECT dep_name, emp_number, total_salary FROM
(SELECT dep_name, emp_number, total_salary, (#rn := #rn + 1) as seqnum FROM
(SELECT name AS dep_name, IF(e.id IS NULL, 0, COUNT(*)) AS emp_number, IFNULL(SUM(salary), 0) AS total_salary
FROM Department d LEFT JOIN Employee e ON e.Department = d.id
GROUP BY d.id HAVING COUNT(*) < 6 ORDER BY SUM(salary) DESC, COUNT(*) DESC, d.id) t )tt WHERE mod(seqnum, 2) = 1;
END
I am hoping to get the query in postgres. Tried setting #rn to row_number() but still not working.
Related
i have three tables vehicles and trips and componentValues they are related to each other by
vehicles -> trips -> componentValues
vehicles Table : id, ...
trips Table: id, vehicle_id, ...
componentValues Table: id, trip_id, damage, ...
and i'm trying to get all the trips with the highest damage component form the componentValues table like this
SELECT *
FROM (select * from trips WHERE "trips"."vehicle_id" = '7') as t
LEFT JOIN (
select * from "component_values"
where trip_id = '85'
order by damage
desc nulls last limit 1
) as h on t.id = h.trip_id
how can i change the line where trip_id = '85' to be dynamic or is their another way to do this and many thanks in advance.
expected result:
UPDATE
i have did some query that get what i want but how can i improve it by not using sub queries in the select statement
select * ,
(select damage from "component_values" where trip_id = trips.id order by damage desc nulls last limit 1) as h_damage,
(select damage from "component_values" where trip_id = trips.id order by damage asc nulls first limit 1) as l_damage,
(select component_types.name from "component_values" left join component_types on component_values.component_type_id = component_types.id where trip_id = trips.id order by damage desc nulls last limit 1) as hc_damage,
(select component_types.name from "component_values" left join component_types on component_values.component_type_id = component_types.id where trip_id = trips.id order by damage asc nulls first limit 1) as lc_damage
from trips
WHERE trips."vehicle_id" = '7'
I think you want distinct on:
select distinct on (t.id) t.*, dv.damage
from trips t join
component_values cv
on cv.trip_id = t.id
where t.vehicle_id = 7 -- not sure if this is needed
order by t.id, cv.damage desc nulls last;
distinct on is usually the most efficient method in Postgres. You can also do this with window functions:
select distinct on (t.id) t.*, cv.damage
from trips t join
(select cv.*,
row_number() over (partition by cv.trip_id, cv.damage desc nulls last) as seqnum
from component_values cv
) cv
on cv.trip_id = t.id and cv.seqnum = 1
where t.vehicle_id = 7; -- not sure if this is needed
I think you want a lateral join.
SELECT *
FROM (select * from trips WHERE "trips"."vehicle_id" = '7') as t
LEFT JOIN lateral (
select * from "component_values"
where trip_id = t.id
order by damage
desc nulls last limit 1
) as h on true
Although I don't think there is a reason for the first subquery, so:
SELECT *
FROM trips
LEFT JOIN lateral (
select * from "component_values"
where trip_id = trips.id
order by damage
desc nulls last limit 1
) as h on true
WHERE "trips"."vehicle_id" = '7'
Please advice on a better way to do this.
I am sure this can be done in one query itself.
declare #tempTale table (ID bigint, ArticleDate datetime,CommentDate
datetime,MostRecentDate datetime)
declare #MinDate datetime;
set #MinDate = getdate();
set #MinDate = DATEADD(YEAR,-100,#MinDate)
insert into #tempTale
select USER_ARTICLEID, User_Article.CREATED_ON, coalesce(comment.CREATED_ON,#MinDate),
case when coalesce(User_Article.CREATED_ON,#MinDate) > coalesce(comment.CREATED_ON,#MinDate) then User_Article.CREATED_ON else comment.CREATED_ON end as MostRecentDate
from User_Article left join Comment on Comment.CONTENTID = User_Article.USER_ARTICLEID and comment.CONTENT_TYPE = User_Article.CONTENT_TYPE
order by MostRecentDate desc
select distinct top 10 ID,MAX(MostRecentDate) from #tempTale group by ID
order by MAX(MostRecentDate) desc
obvious change is to use sub-queries:
select distinct top 10 ID, MAX(MostRecentDate) from
(
select
USER_ARTICLEID as ID,
(case
when coalesce(User_Article.CREATED_ON,#MinDate) > coalesce(comment.CREATED_ON,#MinDate) then User_Article.CREATED_ON
else comment.CREATED_ON end) as MostRecentDate
from User_Article
left join Comment
on Comment.CONTENTID = User_Article.USER_ARTICLEID and comment.CONTENT_TYPE = User_Article.CONTENT_TYPE
)
group by ID
order by 2 desc
but you don't group on computed columns, so you can go with simple one:
select distinct top 10
USER_ARTICLEID as ID,
(case
when coalesce(User_Article.CREATED_ON,#MinDate) > coalesce(comment.CREATED_ON,#MinDate) then User_Article.CREATED_ON
else comment.CREATED_ON end) as MostRecentDate
from User_Article
left join Comment
on Comment.CONTENTID = User_Article.USER_ARTICLEID and comment.CONTENT_TYPE = User_Article.CONTENT_TYPE
group by USER_ARTICLEID
order by 2 desc
I have a query returning the number of rows grouped by date :
SELECT convert(date, run.TimeStamp) as TimeStamp, count(*)
FROM ScriptResult AS res INNER JOIN
ScriptRun AS run ON run.ScriptRunID = res.ScriptRunID INNER JOIN
WorkListItems AS wli ON wli.WorkListItemID = res.WorklistItemID INNER JOIN
WorkList AS wl ON wl.WorkListID = wli.WorkListID
WHERE (wli.WorkListID = #WLID)
GROUP by convert(date, run.TimeStamp)
ORDER BY convert(date, run.TimeStamp);
This produces a result set like this :
TimeStamp (ItemCount)
2015-03-10 5364
2015-03-11 22027
2015-03-12 18037
Now what I want, is to cumulatively summarize the itemcount, like this :
TimeStamp ItemCount TotalCount
2015-03-10 5364 5364
2015 -03-11 22027 27391
2015-03-12 18037 45428
The query needs to be compatible with 2008R2.
I have played with [count ...over..partition by] in several variations but the problem is that the window function boundary should chage. And I cannot use ROWS or RANGE.
Any ideas please ?
Thanks in advance.
Try with correlated subquery:
;WITH cte as(
SELECT convert(date, run.TimeStamp) as TimeStamp, count(*) AS S
FROM ScriptResult AS res INNER JOIN
ScriptRun AS run ON run.ScriptRunID = res.ScriptRunID INNER JOIN
WorkListItems AS wli ON wli.WorkListItemID = res.WorklistItemID INNER JOIN
WorkList AS wl ON wl.WorkListID = wli.WorkListID
WHERE (wli.WorkListID = #WLID)
GROUP by convert(date, run.TimeStamp)
)
SELECT TimeStamp,
S,
(SELECT SUM(S) FROM cte t2 WHERE t2.TimeStamp <= t1.TimeStamp) AS TS
FROM cte t1
You could try creating a temp table to hold the first query results that you can further aggregate to return the cumulative sum on the ItemCount field:
CREATE TABLE #TempTable(
[SeqNo] [int] NULL,
[TimeStamp] [Date] NULL,
[ItemCount] [int] NULL
) ON [PRIMARY]
SELECT
ROW_NUMBER() OVER (PARTITION BY res.ScriptRunID ORDER BY run.TimeStamp) AS SeqNo,
CONVERT(Date, run.TimeStamp) AS TimeStamp,
COUNT(*) AS ItemCount
INTO #TempTable
FROM ScriptResult AS res
INNER JOIN ScriptRun AS run
ON run.ScriptRunID = res.ScriptRunID
INNER JOIN WorkListItems AS wli
ON wli.WorkListItemID = res.WorklistItemID
INNER JOIN WorkList AS wl
ON wl.WorkListID = wli.WorkListID
WHERE (wli.WorkListID = #WLID)
GROUP BY CONVERT(Date, run.TimeStamp)
ORDER BY CONVERT(Date, run.TimeStamp);
SELECT
t1.TimeStamp,
t1.ItemCount,
SUM(t2.ItemCount) AS TotalCount
FROM #TempTable AS t1
INNER JOIN #TempTable AS t2
on t1.SeqNo >= t2.SeqNo
GROUP BY t1.TimeStamp, t1.ItemCount
ORDER BY t1.TimeStamp
SQL Fiddle Example
Note: This links to a Microsoft SQL Server 2014 database version SQL fiddle which should work with SQL Server 2008 as well.
i need to show some field from another table in oracle here is my query
SELECT
ANGGARAN.SIMPEG_PEGAWAI.ID_PEGAWAI AS KODE,
ANGGARAN.SIMPEG_PEGAWAI.NAMA,
ANGGARAN.SIMPEG_PEGAWAI.NIP,
ANGGARAN.SIMPEG_ESELON_JABATAN.JABATAN,
ANGGARAN.SIMPEG_KODE_GOLONGAN_PANGKAT.GOLONGAN,
ANGGARAN.SIMPEG_KODE_GOLONGAN_PANGKAT.PANGKAT,
(SELECT *
FROM (SELECT CONCAT(TO_CHAR(abs(sysdate - TO_DATE(TMT_JABATAN))/360,'9,999,999.9'),' TAHUN')
FROM SIMPEG_JABATAN where ID_PEGAWAI=KODE ORDER BY TMT_JABATAN desc)
WHERE ROWNUM = 1) AS MASA_KERJA
FROM
ANGGARAN.SIMPEG_PEGAWAI
INNER JOIN ANGGARAN.SIMPEG_ESELON_JABATAN
ON ANGGARAN.SIMPEG_PEGAWAI.ESELON_JABATAN = ANGGARAN.SIMPEG_ESELON_JABATAN.ID_ESELON_JABATAN
INNER JOIN ANGGARAN.SIMPEG_KODE_GOLONGAN_PANGKAT
ON ANGGARAN.SIMPEG_PEGAWAI.PANGKAT = ANGGARAN.SIMPEG_KODE_GOLONGAN_PANGKAT.ID_GOLONGAN_PANGKAT
WHERE
ANGGARAN.SIMPEG_PEGAWAI.ST_AKTIF = 1 AND
ANGGARAN.SIMPEG_PEGAWAI.ESELON2 <> 1 AND
ANGGARAN.SIMPEG_PEGAWAI.PANGKAT >= 12 AND
ANGGARAN.SIMPEG_ESELON_JABATAN.STATUS = 1 AND
ANGGARAN.SIMPEG_ESELON_JABATAN.ID_ESELON2=2
ORDER BY
ANGGARAN.SIMPEG_KODE_GOLONGAN_PANGKAT.SORT DESC
result i got
[Err] ORA-00904: "KODE": invalid identifier
the KODE come from query ANGGARAN.SIMPEG_PEGAWAI.ID_PEGAWAI AS KODE, and used for this query
(SELECT *
FROM (SELECT CONCAT(TO_CHAR(abs(sysdate - TO_DATE(TMT_JABATAN))/360,'9,999,999.9'),' TAHUN')
FROM SIMPEG_JABATAN where ID_PEGAWAI=KODE ORDER BY TMT_JABATAN desc)
WHERE ROWNUM = 1) AS MASA_KERJA
that i miss something ? or that could be worogn using an alias in subquery where clause in oracle database ?
You can use an identifier defined in an external query in only one level deep queries. You have to rethink your strategy. My suggestion is to remove the subquery from the select list and put it in the FROM clause. And add another rownumber column like this:
(SELECT
ID_PEGAWAI,
CONCAT(TO_CHAR(abs(sysdate - TO_DATE(TMT_JABATAN))/360,'9,999,999.9'),' TAHUN') MASA_KERJA,
ROW_NUMBER() OVER (PARTITION BY ID_PEGAWAI ORDER BY TMT_JABATAN DESC) rownumber
FROM SIMPEG_JABATAN) xxx
And join like:
ON ANGGARAN.SIMPEG_PEGAWAI = xxx.ID_PEGAWAI
Then in the where clause you can do simply:
WHERE
....
AND xxx.rownumber = 1
Complete query:
SELECT
ANGGARAN.SIMPEG_PEGAWAI.ID_PEGAWAI AS KODE,
ANGGARAN.SIMPEG_PEGAWAI.NAMA,
ANGGARAN.SIMPEG_PEGAWAI.NIP,
ANGGARAN.SIMPEG_ESELON_JABATAN.JABATAN,
ANGGARAN.SIMPEG_KODE_GOLONGAN_PANGKAT.GOLONGAN,
ANGGARAN.SIMPEG_KODE_GOLONGAN_PANGKAT.PANGKAT
FROM
ANGGARAN.SIMPEG_PEGAWAI
INNER JOIN ANGGARAN.SIMPEG_ESELON_JABATAN
ON ANGGARAN.SIMPEG_PEGAWAI.ESELON_JABATAN = ANGGARAN.SIMPEG_ESELON_JABATAN.ID_ESELON_JABATAN
INNER JOIN ANGGARAN.SIMPEG_KODE_GOLONGAN_PANGKAT
ON ANGGARAN.SIMPEG_PEGAWAI.PANGKAT = ANGGARAN.SIMPEG_KODE_GOLONGAN_PANGKAT.ID_GOLONGAN_PANGKAT
INNER JOIN (
SELECT
ID_PEGAWAI,
CONCAT(TO_CHAR(abs(sysdate - TO_DATE(TMT_JABATAN))/360,'9,999,999.9'),' TAHUN') MASA_KERJA,
ROW_NUMBER() OVER (PARTITION BY ID_PEGAWAI ORDER BY TMT_JABATAN DESC) rownumber
FROM SIMPEG_JABATAN
) xxx
ON ANGGARAN.SIMPEG_PEGAWAI.ID_PEGAWAI = xxx.ID_PEGAWAI
WHERE
ANGGARAN.SIMPEG_PEGAWAI.ST_AKTIF = 1 AND
ANGGARAN.SIMPEG_PEGAWAI.ESELON2 <> 1 AND
ANGGARAN.SIMPEG_PEGAWAI.PANGKAT >= 12 AND
ANGGARAN.SIMPEG_ESELON_JABATAN.STATUS = 1 AND
ANGGARAN.SIMPEG_ESELON_JABATAN.ID_ESELON2=2 AND
xxx.rownumber = 1
ORDER BY ANGGARAN.SIMPEG_KODE_GOLONGAN_PANGKAT.SORT DESC
Oracle does not support columns aliases in WHERE clauses (or similar situations like here). You have to name the column again (by its original name).
select dummy as kode from dual where kode = 'X'
> ORA-00904: "KODE": invalid identifier
You need to assign an alias in the level below to use it in a query (I haven't checked the syntax and workability of your query, just changed the part which is essential to answer your question):
SELECT
TMP.KODE,
TMP.NAMA,
TMP.NIP,
ANGGARAN.SIMPEG_ESELON_JABATAN.JABATAN,
ANGGARAN.SIMPEG_KODE_GOLONGAN_PANGKAT.GOLONGAN,
ANGGARAN.SIMPEG_KODE_GOLONGAN_PANGKAT.PANGKAT,
(SELECT *
FROM (SELECT CONCAT(TO_CHAR(abs(sysdate - TO_DATE(TMT_JABATAN))/360,'9,999,999.9'),' TAHUN')
FROM SIMPEG_JABATAN where ID_PEGAWAI=TMP.KODE ORDER BY TMT_JABATAN desc)
WHERE ROWNUM = 1) AS MASA_KERJA
FROM
(SELECT ANGGARAN.SIMPEG_PEGAWAI.ID_PEGAWAI AS KODE, ANGGARAN.SIMPEG_PEGAWAI.* FROM ANGGARAN.SIMPEG_PEGAWAI) TMP
INNER JOIN ANGGARAN.SIMPEG_ESELON_JABATAN
ON TMP.ESELON_JABATAN = ANGGARAN.SIMPEG_ESELON_JABATAN.ID_ESELON_JABATAN
INNER JOIN ANGGARAN.SIMPEG_KODE_GOLONGAN_PANGKAT
ON TMP.PANGKAT = ANGGARAN.SIMPEG_KODE_GOLONGAN_PANGKAT.ID_GOLONGAN_PANGKAT
WHERE
TMP.ST_AKTIF = 1 AND
TMP.ESELON2 <> 1 AND
TMP.PANGKAT >= 12 AND
ANGGARAN.SIMPEG_ESELON_JABATAN.STATUS = 1 AND
ANGGARAN.SIMPEG_ESELON_JABATAN.ID_ESELON2=2
ORDER BY
ANGGARAN.SIMPEG_KODE_GOLONGAN_PANGKAT.SORT DESC
Thank you for taking the time to look at my question.
I've seen similar questions, but not the same depth. Please help!
I would like to update a column all rows in a table that holds user_id and date_created with the lowest date_created for the user_id.
The following select gives me all the rows I would like to update:
select user_id, min(date_created) from mytable s1 where
(select count(1) from mytable s2 where
s1.user_id = s2.user_id group by s2.user_id)
> 1 group by user_id order by user_id;
I would have expected this update to work:
update mytable set join_status = 1 where date_created =
(select min(date_created) from mytable s1 where
(select count(1) from simplepay_payment s2 where
s1.user_id = s2.user_id group by s2.user_id)
> 1 group by user_id);
But is gave the following error:
ERROR: more than one row returned by a subquery used as an expression
I've tried a few different solutions, but nothing seems to help.
Does anyone have any ideas fro me?
Thanks again.
Change your SQL to:
update mytable set join_status = 1 where date_created IN
(select min(date_created) from mytable s1 where
(select count(1) from simplepay_payment s2 where
s1.user_id = s2.user_id group by s2.user_id)
> 1 group by user_id);
Read more on row comparison in the docs.
EDIT:
In the subquery you're performing GROUP BY user_id. This means that you will receive many rows, based on the number of unique user_id values in your simplepay_payment table.
To make your query working as expected, you should join using 2 columns: user_id and date_created. As you've mentioned, you already have the query that gives you the correct results, so you can use it like this:
WITH desired AS (
SELECT user_id, min(date_created) AS mindt
FROM mytable s1 where
(SELECT count(1) FROM mytable s2
WHERE s1.user_id = s2.user_id GROUP BY s2.user_id) > 1
GROUP BY user_id)
UPDATE mytable m SET join_status = 1 FROM desired d
WHERE d.user_id = m.user_id AND d.mindt = m.date_created;
I've wrapped in your query into the Common Table Expression and used it in the UPDATE statement. You can add RETURNING m.* at the end of the query to see the rows that had been updated and their new values.
You can test this query on SQL Fiddle.
EDIT2:
Common Table Expressions (WITH-queries) are not available before version 9.1 for UPDATE statements. You can simply move the CTE subquery into the update, like this:
UPDATE mytable m SET join_status = 1 FROM (
SELECT user_id, min(date_created) AS mindt
FROM mytable s1 where
(SELECT count(1) FROM mytable s2
WHERE s1.user_id = s2.user_id GROUP BY s2.user_id) > 1
GROUP BY user_id) d
WHERE d.user_id = m.user_id AND d.mindt = m.date_created;