I've been tasked with returning only rows with unique IDs but returning a row for every ID in SQL. How would I go about this?
Logic:
For primary row, select where JOB_INDICATOR = ‘P’. If there are multiple rows, then use the record where PRIM_ROLE_IND = ‘Y’. If there are still multiple then select the lowest numbered EMPL_RCD starting at 0.
Example starting point:
id
name
job
job_indicator
prim_role_ind
empl_rcd
1001
John Doe
Director
P
N
0
1001
John Doe
Professor
P
Y
1
1001
John Doe
Coach
N
N
2
1002
Bob Jones
Head Janitor
P
Y
0
1002
Bob Jones
Associate Janitor
P
Y
1
1003
Susan Smith
Groundskeeper
P
N
0
1003
Susan Smith
Professor
P
N
1
Desired return:
id
name
job
job_indicator
prim_role_ind
empl_rcd
1001
John Doe
Professor
P
Y
1
1002
Bob Jones
Head Janitor
P
Y
0
1003
Susan Smith
Groundskeeper
P
N
0
So far, I have the below, but a new requirement was added to do conditional components.
SELECT *
FROM EMPLOYEE
WHERE JOB_INDICATOR = 'P'
You can use window function ROW_NUMBER() to accomplish this:
SELECT *
FROM
(
SELECT EMPLOYEE.*, ROW_NUMBER() OVER (PARTITION BY id ORDER BY
prim_role_ind DESC, empl_rcd ASC) as rn
FROM EMPLOYEE
WHERE JOB_INDICATOR = 'P'
) dt
WHERE rn = 1
Related
We have a SQL database table recording customer comments (ARCMM). I want to extract the most recent comment for each customer. Some customers do not have any comments (i.e. no entries in ARCMM).
The most recent comment for a customer will have the most recent date (field DATEENTR) and, for that date, the highest value of field CNTUNIQ. The query below does not work as expected. Best fix?
Query:
SELECT
----- Customer masterfile
[ARCUS].[IDCUST],
[ARCUS].[NAMECUST],
----- Customer comments
[ARCMM].[CNTUNIQ],
[ARCMM].[DATEENTR],
[ARCMM].[TEXT]
FROM
[ARCUS]
----- Table ARCMM roto ID AR0021 Customer Comments -----
LEFT JOIN [ARCMM]
ON
[ARCMM].[IDCUST] = [ARCUS].[IDCUST]
AND
[ARCMM].[CNTUNIQ] =
(
SELECT MAX([CNTUNIQ])
FROM [ARCMM] ARCMMcopy2
WHERE
[ARCMMcopy2].[IDCUST] = [ARCMM].[IDCUST]
AND
[ARCMM].[DATEENTR] =
(
SELECT MAX([DATEENTR])
FROM [ARCMM] ARCMMcopy1
WHERE
[ARCMMcopy1].[IDCUST] = [ARCMM].[IDCUST]
)
)
Sample table ARCMM data:
IDCUST DATEEENTR CNTUNIQ TEXT
Bob 20200311 1 Bob has woken up
Bob 20200311 2 Bob is having breakfast
Bob 20200629 1 Bob is sleeping <most recent for IDCUST Bob
Jill 20200128 1 Order started
Jill 20200218 1 Order sent
Jill 20200218 2 Goods received
Jill 20200218 3 Goods counted
Jill 20200325 1 Invoice received
Jill 20200325 2 Invoice processed <most recent for IDCUST Jill
Alison 20200225 1 Swimming
Alison 20200425 1 Walking
Alison 20200425 2 Running
Alison 20200425 3 Running
Alison 20200425 4 Sprinting
Alison 20200425 5 Jogging
Alison 20200425 6 Stopped <most recent for IDCUST Alison
Results from my SQL query attempt:
IDCUST NAMECUST CNTUNIQ DATEENTR TEXT
Bob Bob Brown Null Null Null
Jill Jill Jenkins Null Null Null
Alison Alison Allpress 6 20200425 Stopped
Desired results:
IDCUST NAMECUST CNTUNIQ DATEENTR TEXT
Bob Bob Brown 1 20200629 Bob is sleeping
Jill Jill Jenkins 2 20200325 Invoice processed
Alison Alison Allpress 6 20200425 Stopped
You could use row_number() within the left join, if your database supports window functions:
SELECT
c.[IDCUST],
c.[NAMECUST],
m.[CNTUNIQ],
m.[DATEENTR],
m.[TEXT]
FROM [ARCUS] c
LEFT JOIN (
SELECT
m.*,
ROW_NUMBER() OVER(
PARTITION BY [IDCUST]
ORDER BY [DATEENTR] DESC, [CNTUNIQ] DESC
) rn
FROM [ARCMM] m
) m ON m.[IDCUST] = c.[IDCUST] and m.rn = 1
I have a view which results the following rows.
comp Sub-comp Lognum id Firname LAstname
AK AK-G 0 3897 ABC DEF
AK AK-G 0 5432 mark ray
MC MC-A 0 1234 john steve
MC MC-A 0 5678 dan pitcher
MC MC-A 0 9843 james robin
MC MC-A 84 1234 john steve
MC MC-A 84 5678 dan pitcher
MC MC-A 84 9843 james robin
I want to fetch the only the rows that has a lognum (if the same row has 0 also as lognum) along with the other rows that has just 0 as lognum.
The result table should be like this
comp Sub-comp Lognum id Firname LAstname
AK AK-G 0 3897 ABC DEF
AK AK-G 0 5432 mark ray
MC MC-A 84 1234 john steve
MC MC-A 84 5678 dan pitcher
MC MC-A 84 9843 james robin
And the outline of the query is as follows
create view view1 as
select
comp, Sub-comp, "00" as Lognum, id ,Firname ,LAstname
from
table A
inner joins---
UNION
select
select
comp, Sub-comp, Lognum, id ,Firname ,LAstname from
table B
inner joins----
;
Can anyone help?
Thanks!
Try this:
select * from(
select comp,
Sub-comp,
Lognum,
id,
Firname,
LAstname,
row_number() over(partition by id order by lognum desc) rn
from table_name)
where rn = 1;
This will show the line with the biggest lognum grouped by the ID.
This query should work, even in cases where, for a given id value, you have multiple "non-zero" lognum rows.
If you look at the where clause, rows with non-zero lognum values are always returned (t.Lognum != 0). But rows with zero lognum values will also return, but only if the t.rn = 1 condition is true, which will only happen if there aren't any other non-zero lognums for that same id (see the order by clause of the row_number() window function).
select t.comp,
t.Sub-comp,
t.Lognum,
t.id,
t.Firname,
t.LAstname
from (select t.*,
row_number() over (
partition by t.id
order by case when t.lognum = 0 then 1 else 0 end) as rn
from your_view t) t
where t.Lognum != 0 or t.rn = 1
I've been playing with this for days, and can't seem to come up with something. I have this query:
select
v.emp_name as Name
,MONTH(v.YearMonth) as m
,v.SalesTotal as Amount
from SalesTotals
Which gives me these results:
Name m Amount
Smith 1 123.50
Smith 2 40.21
Smith 3 444.21
Smith 4 23.21
Jones 1 121.00
Jones 2 499.00
Jones 3 23.23
Jones 4 41.82
etc....
What I need to do is use a JOIN or something, so that I get a NULL value for each month (1-12), for each name:
Name m Amount
Smith 1 123.50
Smith 2 40.21
Smith 3 444.21
Smith 4 23.21
Smith 5 NULL
Smith 6 NULL
Smith ... NULL
Smith 12 NULL
Jones 1 121.00
Jones 2 499.00
Jones 3 23.23
Jones 4 41.82
Jones 5 NULL
Jones ... NULL
Jones 12 NULL
etc....
I have a "Numbers" table, and have tried doing:
select
v.emp_name as Name
,MONTH(v.YearMonth) as m
,v.SalesTotal as Amount
from SalesTotals
FULL JOIN Number n on n.Number = MONTH(v.YearMonth) and n in(1,2,3,4,5,6,7,8,9,10,11,12)
But that only gives me 6 additional NULL rows, where what I want is actually 6 NULL rows for each group of names. I've tried using Group By, but not sure how to use it in a JOIN statement like that, and not even sure if that's the correct route to take.
Any advice or direction is much appreciated!
Here's one way to do it:
select
s.emp_name as Name
,s.Number as m
,st.salestotal as Amount
from (
select distinct emp_name, number
from salestotals, numbers
where number between 1 and 12) s left join salestotals st on
s.emp_name = st.emp_name and s.number = month(st.yearmonth)
Condensed SQL Fiddle
You could do:
SELECT EN.emp_name Name,
N.Number M,
ST.SalesTotal Amount
FROM ( SELECT Number
FROM NumberTable
WHERE Number BETWEEN 1 AND 12) N
CROSS JOIN (SELECT DISTINCT emp_name
FROM SalesTotals) EN
LEFT JOIN SalesTotals ST
ON N.Number = MONTH(ST.YearMonth)
AND EN.emp_name = ST.emp_name
I have a table with IDs and primary information. I also have two delta tables keyed on ID and date of change. I need to build a view that merges these three tables together indicating all changes over time.
Main Table:
ID Name
-- ------------------
1 Bob Jones
2 Dave Smith
First Attribute Table:
ID Date Attr1
-- ---------- -----
1 01/01/2013 25
1 02/15/2013 33
1 02/17/2013 47
1 03/02/2013 58
2 02/01/2013 1
...
Second Attribute Table
ID Date Attr2
-- ---------- -----
1 01/01/2013 ABC
1 01/05/2013 DEF
1 01/15/2013 RST
1 02/10/2013 XYZ
1 02/15/2013 Foo
1 03/05/2013 Blah
2 02/01/2013 Two
...
Based on that data, for Bob Jones, I need the view to return the following:
ID Name Date Attr1 Attr2
-- ----------- ---------- ----- -----
1 Bob Jones 01/01/2013 25 ABC
1 Bob Jones 01/05/2013 25 DEF
1 Bob Jones 01/15/2013 25 RST
1 Bob Jones 02/10/2013 25 XYZ
1 Bob Jones 02/15/2013 33 Foo
1 Bob Jones 02/17/2013 47 Foo
1 Bob Jones 03/02/2013 58 Foo
1 Bob Jones 03/05/2013 58 Blah
I tried outer joining the attribute tables to get all change values ordered by date and then used an outer join on the entire query with itself to get "prior" records:
with qry as (
select
rownum = ROW_NUMBER() OVER (ORDER BY m.ID, a.DATE),
m.ID,
m.Name,
a.DATE,
a.Attr1,
a.Attr2
from Main m
inner join (
select
COALESCE(a1.ID, a2.ID) as ID,
COALESCE(a1.LOAD_DATE, a2.LOAD_DATE) as LOAD_DATE,
a1.Attr1,
a2.Attr2
from Attributes1 a1
full outer join Attributes2 a2
on (a1.ID = a2.ID and a1.DATE = a2.DATE)
) a on (a.ID = m.ID)
)
select
COALESCE(qry.ID, prev.ID) as ID,
COALESCE(qry.Name, prev.Name) as Name,
COALESCE(qry.DATE, prev.DATE) as DATE,
COALESCE(qry.Attr1, prev.Attr1) as Attr1,
COALESCE(qry.Attr2, prev.Attr2) as Attr2,
from qry
left join qry prev
on (prev.rownum = qry.rownum - 1)
order by ID, DATE
However, that doesn't work when one attribute table changes quicker than the other because the attributes that didn't change are null in the results of the attribute table join and if two nulls show up back-to-back, the coalesce will return a null when I need the last non-null value that was in that column.
Can this even be done in a view in SQL Server 2012?
I am trying to select unique random posting/recruitment places of employees within a list of places, all the employees are already posted at the places, i am trying to generate a new random posting place for them with "where" condition that "employee new random location will not be equal to their home place"
Employee table is :
EmpNo Empname CurrentPosting Home Designation RandomPosting
1 Satish Kumar Samastipur Gazi Manager
2 Anil Kumar Singh Vaishali Patna Manager
3 Rajdev Prasad Nawada Gaya PO
4 Rajesh Kumar Sheikhpura Muzaffarpur PO
5 Jitendra Kumar Banka Bhagalpur Clerk
And so on...
And Places table is
PlaceID PlaceName Manager PO Clerk
1 Araria 2 0 1
2 Arwal 1 1 1
3 Aurangabad 1 0 2
4 Banka 2 1 1
5 Begusarai 1 1 1
6 Bhagalpur 1 1 2
7 Bhojpur 0 2 0
and so on...
i tried with rand() and newid() like as below,
select Employee.*, Place.PlaceName As RandomPosting from Employee
inner join Place on Place.PlaceID=Employee.EmpNo order by newid()
But unable to select what is required... that is to assign each Employee a PlaceName(from Place) randomly which is not equal to CurrentPosting and Home(in Employee).
Thanks in advance.
WITH cteCrossJoin AS (
SELECT e.*, p.PlaceName,
ROW_NUMBER() OVER(PARTITION BY e.EmpNo ORDER BY NEWID()) AS RowNum
FROM Employee e
CROSS JOIN Place p
WHERE e.Home <> p.PlaceName
)
SELECT *
FROM cteCrossJoin
WHERE RowNum = 1;