I have a table that has (for example) 4 columns.
pk_table_id INT NOT NULL
username VARCHAR(100) NOT NULL
start_date DATETIME NOT NULL
end_date DATETIME NULL
My requirement is to return all rows in descending order of end_date - BUT the NULL values must be first, and then descending order of start_date.
I've done it in SQL - but could someone assist me with a LINQ version to do this?
This is the SQL query we use:
SELECT [person_employment_id]
, [party_id]
, [employer_name]
, [occupation]
, [telephone]
, [start_date]
, [end_date]
, [person_employment_type_id]
, [person_employment_end_reason_type_id]
, [comments]
, [deleted]
, [create_user]
, [create_date]
, [last_update_user]
, [last_update_date]
, [version]
FROM [dbo].[person_employment]
WHERE ([party_id]=#party_id)
ORDER BY ISNull([end_date],'9999-DEC-31') DESC, [start_date] DESC
For this problem, you could do a null check on the end_date and use that result as the ordering. So you don't need to use the same SQL constructs to achieve this, but rather use one more natural in your language of choice (C# I'm assuming).
var query =
from row in dc.Table
let isEndDateNull = row.end_date == null
orderby isEndDateNull descending, row.start_date descending
select row;
Related
Output result
I want the running balance in my query. I had wrote the query.
May be i am mistaking any where please let me know.
SELECT
ACC_VMAST.VM_DATE,
ACC_VDET.CHEQUE,
ACC_VMAST.NARRATION,
ACC_VDET.DEBIT,
ACC_VDET.CREDIT,
sum(nvl(ACC_VDET.DEBIT,0) - nvl(ACC_VDET.CREDIT,0) )
over (order by ACC_VMAST.VM_DATE , ACC_VDET.DEBIT ) running_bal
FROM ACC_VMAST,
ACC_VDET,
ACC_COA
WHERE ACC_VMAST.VM_PK=ACC_VDET.VM_PK
AND ACC_COA.COA_PK=ACC_VDET.COA_PK
AND ACC_VMAST.POST_BY IS NOT NULL
AND ACC_VMAST.CANCEL_STATUS IS NULL
AND ACC_VMAST.VM_DATE BETWEEN '07/06/2021' AND '07/07/2021'
AND ACC_VDET.COA_PK= '303'
ORDER BY ACC_VMAST.VM_DATE , ACC_VDET.DEBIT;
If you have rows that have the same values for the ORDER BY clause then when you SUM the values then all the rows with the same ORDER BY value will be grouped together and totalled.
To prevent that, you can add the ROWNUM pseudo-column to the ORDER BY clause of the analytic function so that there will not be any ties:
SELECT m.VM_DATE,
d.CHEQUE,
m.NARRATION,
d.DEBIT,
d.CREDIT,
SUM( COALESCE(d.DEBIT,0) - COALESCE(d.CREDIT,0) )
OVER ( ORDER BY m.VM_DATE, d.DEBIT, ROWNUM ) AS running_bal
FROM ACC_VMAST m
INNER JOIN ACC_VDET d
ON (m.VM_PK = d.VM_PK)
INNER JOIN ACC_COA c
ON (c.COA_PK = d.COA_PK)
WHERE m.POST_BY IS NOT NULL
AND m.CANCEL_STATUS IS NULL
AND m.VM_DATE BETWEEN DATE '2021-07-06' AND DATE '2021-07-07'
AND d.COA_PK = '303'
ORDER BY
m.VM_DATE,
d.DEBIT;
You need to add a row range with "rows between unbounded preceding and current row".
sum(nvl(ACC_VDET.DEBIT,0) - nvl(ACC_VDET.CREDIT,0) )
over (order by ACC_VMAST.VM_DATE , ACC_VDET.DEBIT rows between unbounded preceding and current row ) running_bal
Hi
I have the above table of data, I would like to group them into a single row ignoring NULL values, Any help on this greatly appreciated,
You can try this query, it will work
select max(classid),
classname,
max(frequency),
max(notice),
max(typeofdays),
max(rnotice),
max(classpercent)
from <table_name>
group by classname;
Using lag and partition can solve my requirement
SELECT FUND_CLASS_ID,
NVL(SUB_NOTICE_DAYS , LAG (SUB_NOTICE_DAYS , 1) OVER (PARTITION BY LFC.ID ORDER BY SUB_NOTICE_DAYS NULLS LAST)) SUB_NOTICE_DAYS ,
NVL(SUB_NOTICE_TYPE_OF_DAYS_ID , LAG (SUB_NOTICE_TYPE_OF_DAYS_ID , 1) OVER (PARTITION BY LFC.ID ORDER BY SUB_NOTICE_TYPE_OF_DAYS_ID NULLS LAST)) SUB_NOTICE_TYPE_OF_DAYS_ID
FROM CLASS
I am running a query to retrieve an integer but want to put a check for nulls. If null I want the query to return 0. How can I do that? I tried this below but it's not working
select NVL(A_COUNT, 0) from MYTABLE where VEH_YEAR = '2003';
If A_COUNT is null I want the query to return 0. In the above case I don't have a value 2003 in VEH_YEAR column. The query works if I have a value 2003 in VEH_YEAR column but A_COUNT is null.
Better version of your uery would be, using an Aggregate function like MAX before using NVL.
select NVL(MAX(A_COUNT),0) from MYTABLE where VEH_YEAR = '2003';
SELECT NVL((select A_COUNT from MYTABLE where VEH_YEAR = '2003'), 0) A_COUNT from dual;
This worked.
I have created an Oracle SQL query in TOAD which works fine. I now need to put this in a procedure.
The query has to create two counts based on different criteria (I have used With Select) and insert these plus a date and location to a table.
The query that works is
with
Selected_animals as
( SELECT TO_CHAR(SYSDATE,'DD/MM/YYYY' ) as Report_Date,
loc.name location,
count(rran.id) as Count_exported
FROM rr_animals rran,
contact con,
locations loc,
names nam
WHERE con.connum = rran.connum
AND con.loc_id = loc.id
AND con.connum = nam.connum
AND nam.name_type = 'STAND'
AND nam.dob IS NOT NULL
AND rran.sex IS NOT NULL
AND rran.web_display = 'Y'
AND rran.web_description IS NOT NULL
AND rran.visit_end_date IS NULL
AND con.loc_id IS NOT NULL
AND con.datedl IS NULL
AND rran.hold_user IS NULL
AND rran.assess_status IS NULL
AND EXISTS (SELECT rrim.id
FROM rr_images rrim
WHERE rrim.image_type = 'KENNEL'
AND rrim.rran_id = rran.id
AND DBMS_LOB.GETLENGTH(rrim.image_object) >0
AND rrim.image_object IS NOT NULL)
group by loc.NAME ),
total_animals as
(select vbav.sitename as location,
count(vbav.rran_ID) as Count_available
from v_bx_all_animal_visits vbav
where visit_end_date is null
and concat != 'DELTD'
and concat != 'DSCD'
group by vbav.sitename)
select Total_animals.location,
Selected_animals.Report_date,
Selected_animals.count_exported,
Total_animals.count_available
from Selected_animals, total_animals
where total_animals.location = selected_animals.location(+)
I have looked at several ways that seem to write the procedure but nothing seems to work. Including which was added under the CREATE or REPLACE and before BEGIN:
( o_location out bx_webstats_export_available.LOCATION%TYPE,
o_date out bx_webstats_export_available.REPORT_DATE%TYPE,
o_exported out bx_webstats_export_available.COUNT_EXPORTED%TYPE,
o_available out bx_webstats_export_available.COUNT_AVAILABLE%TYPE )
Also added after the last where statement and before End:
INSERT INTO bx_webstats_export_available(location, report_date, count_export, count_available)
values (Total_animals.location,
Selected_animals.Report_date,
Selected_animals.count_exported,
Total_animals.count_available);
Can anyone help me get this query in a Procedure please?
This is the first time I have written a Procedure from scratch and I'm struggling with it.
Many thanks,
What is it you're trying to do? Insert the results of that select into a table? If so, the following ought to suffice:
create or replace procedure your_proc_name
as
begin
insert into bx_webstats_export_available(location, report_date, count_export, count_available)
with selected_animals as (select to_char(sysdate,'DD/MM/YYYY' ) as report_date,
loc.name location,
count(rran.id) as count_exported
from rr_animals rran,
contact con,
locations loc,
names nam
where con.connum = rran.connum
and con.loc_id = loc.id
and con.connum = nam.connum
and nam.name_type = 'STAND'
and nam.dob is not null
and rran.sex is not null
and rran.web_display = 'Y'
and rran.web_description is not null
and rran.visit_end_date is null
and con.loc_id is not null
and con.datedl is null
and rran.hold_user is null
and rran.assess_status is null
and exists (select rrim.id
from rr_images rrim
where rrim.image_type = 'KENNEL'
and rrim.rran_id = rran.id
and dbms_lob.getlength(rrim.image_object) >0
and rrim.image_object is not null)
group by loc.name),
total_animals as (select vbav.sitename as location,
count(vbav.rran_id) as count_available
from v_bx_all_animal_visits vbav
where visit_end_date is null
and concat != 'DELTD'
and concat != 'DSCD'
group by vbav.sitename)
select total_animals.location,
selected_animals.report_date,
selected_animals.count_exported,
total_animals.count_available
from selected_animals, total_animals
where total_animals.location = selected_animals.location(+);
end your_proc_name;
/
If not, then please explain a bit more about the requirements you're trying to satisfy.
I need to create a query, that if a certain field is blank or null. I need to do a select statement to another table and retrieve the blank field . Could you please advise on a way to accomplish this. Below is the query. The field in question is BEAT.
SELECT COALESCE(ADDRESSES.BEAT,Incident_addresses.beat)
, COALESCE (ADDRESSES.SUB_BEAT,Incident_addresses.sub_beat)
, ADDRESSES.STREET_NAME
, ADDRESSES.STREET_NUMBER
, ADDRESSES.SUB_NUMBER
, WARRANT_PEOPLE_VW.LNAME
, WARRANT_PEOPLE_VW.FNAME
, WARRANT_PEOPLE_VW.DOB
, WARRANT_PEOPLE_VW.RACE_RACE_CODE
, WARRANT_PEOPLE_VW.SEX_SEX_CODE
, WARRANT_PEOPLE_VW.CASE_NUMBER
, E_WARRANTS.DATE_ISSUED
, E_WARRANTS.TELETYPE_NUMBER
, E_WARRANTS.ORDINANCE_VIOLATION
FROM EJSDBA.ADDRESSES
, POL_LEEAL.E_WARRANTS
, POL_LEEAL.WARRANT_PEOPLE_VW,incident_people,Incident_addresses
WHERE ADDRESSES.ADDRESS_ID =E_WARRANTS.ADDR_ADDRESS_ID
AND E_WARRANTS.WARRANT_ID = WARRANT_PEOPLE_VW.WARRANT_ID
AND WARRANT_PEOPLE_VW.NME_TYP_NAME_TYPE_CODE = 'P'
AND WARRANT_PEOPLE_VW.AGNCY_CD_AGENCY_CODE = 'MCPD'
AND WARRANT_PEOPLE_VW.WSC_CODE='A'
AND EJSDBA.ADDRESSES.ADDRESS_ID= Incident_addresses.ADDRESS_ID
and incident_people.inc_incident_id=Incident_addresses.incident_id
ORDER BY ADDRESSES.BEAT
, ADDRESSES.SUB_BEAT
, ADDRESSES.STREET_NAME
, ADDRESSES.STREET_NUMBER
;
You can embed a correlated subquery into a case expression, but you MUST reference the table inside the subquery to some values of the outer query so that the correct value can be located.
SELECT
COALESCE(ADDRESSES.BEAT, Incident_addresses.beat)
, CASE
WHEN Addresses.BEAT IS NULL THEN (
SELECT
Beat
FROM incidents inner_ref
WHERE ???outer??.incident_id = inner_ref.id
AND rownum = 1)
END AS x
, COALESCE(ADDRESSES.SUB_BEAT, Incident_addresses.sub_beat)
...
and that subquery MUST only return a single value (hence I have used "and rownum = 1".
(In Oracle 12 you could use FETCH FIRST 1 ROW ONLY)