Purpose & What I've Got So Far
I am attempting to create a view which checks for missing labor transactions. The view will be fed to a Crystal report.
In this case, the view should take all dates between sysdate+30 and sysdate -30, and then should left outer join all labor records by active employees for each of those dates. It then gives a count of the number of labor transactions for each employee for each date.
This gets passed to the Crystal Report, which will filter based on a specific date range (within the +/- 30 range by the view). From there, the count of all days will summed up per employee in Crystal, and employees will show up which have zero transactions.
The Problem
Without spitting out a list of every date, initially, I'm using labor transaction for each date, but some have no counts for any date. These folks show null transaction dates with zero hours. This indicates they have no charges for the entire period, which makes sense.
However, when Crystal does a filter on that data and selects a range, I believe it leaves out these null values, thus not allowing me to show the full range of folks who don't have time submitted.
The Question
Is there a way to do the equivalent of "select every date between (sysdate+30) and (sysdate-30)" in a view, so that I can use it to compare all the time against?
The SQL (for reference)
SELECT QUERY.LABORRECLABORCODE
, QUERY.LABORRECEMPLOYEENUM
, QUERY.PERSONRECDISPLAYNAME
, QUERY.TRANSSTARTDATE
, COUNT(TRANSROWSTAMP) AS ROWCOUNT
FROM (SELECT *
FROM (SELECT LABOR.LABORCODE AS LABORRECLABORCODE
, LABOR.LA20 AS LABORRECEMPLOYEENUM
, PERSON.DISPLAYNAME AS PERSONRECDISPLAYNAME
FROM LABOR
LEFT OUTER JOIN PERSON
ON ( LABOR.LABORCODE = PERSON.PERSONID )
WHERE LABOR.STATUS = 'ACTIVE'
AND LABOR.LA20 IS NOT NULL
AND PERSON.DISPLAYNAME IS NOT NULL
AND LOWER(PERSON.DISPLAYNAME) NOT LIKE '%kimball%'
AND LOWER(PERSON.DISPLAYNAME) NOT LIKE '%electrico%'
AND LOWER(PERSON.DISPLAYNAME) NOT LIKE '%misc labor cost adj%'
AND LOWER(PERSON.DISPLAYNAME) NOT LIKE '%brossoit%'
AND LOWER(PERSON.DISPLAYNAME) NOT LIKE '%brossiot%')PERSONINFO
LEFT OUTER JOIN (SELECT STARTDATE AS TRANSSTARTDATE
, LABORCODE AS TRANSLABORCODE
, ROWSTAMP AS TRANSROWSTAMP
FROM LABTRANS
WHERE STARTDATE BETWEEN ( SYSDATE - 30 ) AND ( SYSDATE + 30 ))LABTRANSLIMITED
ON ( PERSONINFO.LABORRECLABORCODE = LABTRANSLIMITED.TRANSLABORCODE ))QUERY
GROUP BY LABORRECLABORCODE
, TRANSSTARTDATE
, LABORRECEMPLOYEENUM
, PERSONRECDISPLAYNAME
ORDER BY LABORRECLABORCODE
, TRANSSTARTDATE
;
select trunc(sysdate)+31-level from dual connect by level <=61
This is a good method for generating any arbitrary list of values.
Or another method: pick a table with a lot of rows
select sysdate+30 - rownum from user_objects where rownum<61
In order to meet my requirements of being sysdate -30 and sysdate + 30 in a range, this seems be the most elegant way of doing things for now:
SELECT *
FROM (SELECT TRUNC(SYSDATE - ROWNUM) DT
FROM DUAL
CONNECT BY ROWNUM < 31
UNION
SELECT TRUNC(SYSDATE + ROWNUM) DT
FROM DUAL
CONNECT BY ROWNUM < 31)DATERANGE;
I used this answer from this SO Question and expanded upon that thinking, using a union to join the queries that went in separate directions.
Related
I have a PL-SQL table with a structure as shown in the example below:
I have customers (customer_number) with insurance cover start and stop dates (cover_start_date and cover_stop_date). I also have dates of accidents for those customers (accident_date). These customers may have more than one row in the table if they have had more than one accident. They may also have no accidents. And they may also have a blank entry for the cover stop date if their cover is ongoing. Sorry I did not design the data format, but I am stuck with it.
I am looking to calculate the number of accidents (num_accidents) and number of customers (num_customers) in a given time period (period_start), and from that the number of accidents-per-customer (which will be easy once I've got those two pieces of information).
Any ideas on how to design a PL-SQL function to do this in a simple way? Ideally with the time periods not being fixed to monthly (for example, weekly or fortnightly too)? Ideally I will end up with a table like this shown below:
Many thanks for any pointers...
You seem to need a list of dates. You can generate one in the query and then use correlated subqueries to calculate the columns you want:
select d.*,
(select count(distinct customer_id)
from t
where t.cover_start_date <= d.dte and
(t.cover_end_date > d.date + interval '1' month or t.cover_end_date is null)
) as num_customers,
(select count(*)
from t
where t.accident_date >= d.dte and
t.accident_date < d.date + interval '1' month
) as accidents,
(select count(distinct customer_id)
from t
where t.accident_date >= d.dte and
t.accident_date < d.date + interval '1' month
) as num_customers_with_accident
from (select date '2020-01-01' as dte from dual union all
select date '2020-02-01' as dte from dual union all
. . .
) d;
If you want to do arithmetic on the columns, you can use this as a subquery or CTE.
I have a table with following structure.
Note_title varchar2(100)
Note_created_on date
Now in a report, I want to show all notes created week-wise, So I implemented the following solution for it.
SELECT to_char(Note_created_on - 7/24,'ww')||'/'||to_char(Note_created_on - 7/24,'yyyy') as Week ,
nvl(COUNT(Note_title),'0') as AMOUNT
FROM Notes
GROUP BY to_char(Note_created_on - 7/24,'ww') ,
to_char(Note_created_on -7/24,'yyyy')
ORDER BY to_char(Note_created_on - 7/24,'ww') DESC
And i am getting correct output from it, But suppose week 42,45 do not have any created Note then its just missing it.
Sample Output:
WEEK AMOUNT
46/2018 3
44/2018 22
43/2018 45
41/2018 1
40/2018 2
39/2018 27
38/2018 23
So How can I get zero values for week 42,45 instead of leaving them out?
First you would need to generate all the weeks between each year, after that would left join with the Notes tables on the weeks and group by the weeks generated. Eg:
with weeks
as ( select level as lvl /*Assume 52 weeks in a calendar year..*/
from dual
connect by level <=52
)
,weeks_year
as (select distinct
b.lvl||'/'||trunc(Note_created_on,'YYYY') as week_year_val /*From the start of year in Note_created_on*/
from Notes a
join weeks b
on 1=1
)
SELECT a.week_year_val as Week
,COUNT(Note_title) as AMOUNT
FROM weeks_year a
LEFT JOIN Notes b
ON a.week_year_val=to_char(b.Note_created_on - 7/24,'ww')||'/'||to_char(b.Note_created_on - 7/24,'yyyy')
GROUP BY a.week_year_val
ORDER BY a.week_year_val DESC
If you want to perform this for the current year, you may use the following SQL statement which uses such a RIGHT JOIN as below :
SELECT d.week as Week,
nvl(COUNT(Note_title), '0') as AMOUNT
FROM Notes
RIGHT JOIN
(SELECT lpad(level,2,'0')|| '/' ||to_char(sysdate,'yyyy') as week,
'0' as amount FROM dual CONNECT BY level <= 53) d
ON
( d.week =
to_char(Note_created_on - 7 / 24, 'ww') ||'/'||to_char(Note_created_on - 7 / 24, 'yyyy') )
GROUP BY d.week
ORDER BY d.week DESC;
P.S. There's a common belief that a year is composed of 52 weeks, true but truncated :). So, I used 53,
Notice that select to_char( date'2016-12-31' - 7 / 24, 'ww') from dual yields 53 as a sample.
Rextester Demo
As mentioned by jarlh:
Create a list of weeks:
SELECT TO_CHAR(LEVEL, 'FM00')||'/2018' wk
FROM dual
CONNECT BY LEVEL <= 53
This query generates 53 rows, and level is just a number.. 1.. 2.. upto 53. We format it to become 01/2018, 02/2018.. 53/2018
If you plan to use this query in other years, you'd be better off making the year dynamic:
SELECT TO_CHAR(LEVEL, 'FM00')||TO_CHAR(sysdate-7/24,'/YYYY') wk
FROM dual
CONNECT BY LEVEL <= 53
(Credits to Barbaros for pointing out that the last day of any year is reported by Oracle as being in week 53, or said another way 7*52 = 364)
We left join the notes data onto it. I wasn't really clear on why you subtracted 7 hours from the date (time zone?) but I left it. I removed the complexity of the count, as you seem to only want the count of records in a particular week. I also removed the double to_char, because you can do it all in a single operation. One doesn't need to TO_CHAR(date, 'WW')||'/'||TO_CHAR(date,'YYYY') etc.. you just tochar with WW/YYYY as a format. Our query now looks like:
SELECT lst.wk as week, COALESCE(amt, 0) as amount FROM
(
SELECT TO_CHAR(LEVEL, 'FM00')||TO_CHAR(sysdate-7/24,'/YYYY') wk
FROM dual
CONNECT BY LEVEL <= 52
) lst
LEFT OUTER JOIN
(
SELECT
to_char(Note_created_on - 7/24,'ww/yyyy') as wk,
COUNT(*) as amt
FROM Notes
GROUP BY to_char(Note_created_on - 7/24,'ww/yyyy')
) dat
ON lst.wk = dat.wk
ORDER BY lst.wk
For weeks where there are no note, the left join records a null against that week, so we coalesce it to make it 0.
You can, of course, do the query in other ways (many ways), here's a compare:
SELECT lst.wk as week, COUNT(dat.wk) as amount FROM
(
SELECT TO_CHAR(LEVEL, 'FM00')||TO_CHAR(sysdate-7/24,'/YYYY') wk
FROM dual
CONNECT BY LEVEL <= 52
) lst
LEFT OUTER JOIN
(
SELECT
to_char(Note_created_on - 7/24,'ww/yyyy') as wk
FROM Notes
) dat
ON lst.wk = dat.wk
GROUP BY lst.wk
ORDER BY lst.wk
In this form we do the groupby/count after the join. By counting the dat.wk, which for some lst.wk might be NULL, we can omit the coalesce, because count(null) is 0
Given an employees table with the columns EmpID,FirstName,LastName,StartDate, and EndDate.
I want to use a query on Oracle to calculate the longest period in days that a company has gone without headcount change.
Here is my query:
select MAX(endDate-startDate)
from
(select endDate
from employees
where endDate is not null)
union all
(select startDate
from employees)
But I got an error:
ORA-00904:"STARTDATE":invalid identifier
How can I fix this error?
Is my query the correct answer to this question?
Thanks
You aren't returning the startDate in the sub-query. Add startDate to the inner query.
select MAX(endDate-startDate) from
(select startDate, endDate from employees where endDate is not null)
union all
(select startDate from employees)
EDIT:
You can also try this:
select MAX(endDate-startDate) from employees where endDate is not null
However, I don't think your query is what you're looking for as it only lists the longest term employee that no longer works at the company.
In a simplistic view, you would want to put together all the start-dates (when the headcount increases) and all the end-dates (when it decreases), combine them all, arrange them in increasing order, measure the differences between consecutive dates, and take the max.
"Put together" is a UNION ALL, and measure differences between "consecutive" dates can be done with the analytic function lag().
One complication: one employee may start exactly on the same date another is terminated, so the headcount doesn't change. More generally, on any given date there may be starts and ends, and you need to exclude the dates when there are an equal number of starts and ends. So the first part of the solution is more complicated: you need to group by date and compare the start and end counts.
Something like this may work (not tested!):
with d ( dt, flag ) as (
select start_date, 's' from employees union all
select end_date , 'e' from employees
),
prep ( int ) as
select dt - lag(dt) over (order by dt)
from d
group by dt
having count(case flag when 's' then 1 end) !=
count(case flag when 'e' then 1 end)
)
select max(int) as max_interval
from prep
;
Edit - Gordon has a good point in his solution: perhaps the longest period without a change in headcount is the current period (ending "now"). For this reason, one needs to add SYSDATE to the UNION ALL, like he did. It can be added with either flag (for example 's' to be specific).
I think the answer to your question is something like this:
select max(span)
from (select (lead(dte) over (order by dte) - dte) as span
from (select startDate as dte from employees union all
select endDate as dte from employees union all
select trunc(sysdate) from dual
) d
) d;
A head-count change (presumably) occurs when an employee starts or stops. Hence, you want the largest interval between two such adjacent dates.
I have two tables that are almost exactly the same. The only difference is one is an archive table (call that B) that has any records removed from the other table (call that A)
I'm needing to get ALL records from a given data range, thus I need to join the two tables (and actually join them to a third to get a piece of information that's not on those tables, but that doesn't affect my problem).
I'm wanting to group by the hour the record comes from (i.e. trunc(<date_field>, 'hh')
However, since I need to get records from each hour from the two tables it seems I would need to generate a single date field to group on, otherwise the group wouldn't make sense; each record will only have a date from one field so if I group by either table's date field it would inherently omit records from the other, and if I group by both I'll get no data back as no record appears in both tables.
SO, what I want to do is add two "dates" and have it work like it would in Excel (i.e. the dates get treated as their numeric equivalent, get added, and the resultant date is returned, which by the way is at least one case where adding dates is valid, despite this thread's opinion otherwise)
This makes even more sense as I'll be replacing the null date value with 0 so it should functionally be like adding a number to a date (12/31/14 + 1 = 1/1/15).
I just haven't been able to get it to work. I've tried several iterations to get the calculation to work the latest being:
SELECT DISTINCT Avg(NVL(to_number(to_char(trunc(fcr.actual_start_date, 'hh')))*86400, 0) + NVL(to_Number(to_char(trunc(acr.actual_start_date, 'hh')))*86400, 0)) Start_Num, SUM(AA.SESSIONCPU) TotalCPU, Count(1) Cnt
, SUM((NVL(to_number(to_char(trunc(fcr.actual_completion_date, 'hh')))*86400, 0) + NVL(to_Number(to_char(trunc(acr.actual_completion_date, 'hh')))*86400, 0)
- NVL(to_number(to_char(trunc(fcr.actual_start_date, 'hh')))*86400, 0) - NVL(to_Number(to_char(trunc(acr.actual_start_date, 'hh')))*86400, 0))) TotRun
FROM PSTAT.A$_A AA
LEFT OUTER JOIN APPL.FND_CR FCR On FCR.O_SES_ID = AA.SEsID
LEFT OUTER Join XX.E_FND_CR ACR on ACR.O_SES_ID = aa.sesid
WHERE (trunc(fcr.actual_start_date) >= to_date('28-Dec-2014', 'DD-MON-YYYY')
Or trunc(acr.actual_start_date) >= to_date('28-Dec-2014', 'DD-MON-YYYY'))
AND rownum <= 1048500
and (acr.status_code = 'C' or fcr.status_Code = 'C')
AND aa.sessioncpu is not null
GROUP BY to_number(NVL(trunc(fcr.actual_start_date, 'hh'), 0))*86400 + to_Number(NVL(trunc(acr.actual_start_date, 0), 'hh'))*86400
ORDER BY 2, 1;
My explicit problem with the code above is that Toad keeps ignoring the casts and says it is expecting a date value when it gets a number (the 0 gets highlighted). So if someone could:
A) Tell my why Toad would ignore the casts (it should be seeing a number and so should have absolutely no expectation of a date)
B) Provide any suggestions on how to get the addition to work, or failing that suggest an alternative route to combine the three tables so that I'm able to group by the start date values
As always, any help is much appreciated.
Adding dates or casting them to number throws ORA-00975: date+date not allowed and ORA-01722: invalid number.
So what can be done here to operate on dates in Excel way? My idea is to substract first day from calendar to_date(1, J) from each date you want to operate on.
Example with test dates:
with test_data as (
select sysdate dt from dual union all
select to_date(1, 'J') from dual union all
select null from dual )
select nvl(trunc(dt, 'hh') - to_date(1, 'J'), 0) num_val, dt,
to_char(dt, 'J') tc1, to_char(dt, 'yyyy-mm-ss hh24:mi:ss') tc2
from test_data
NUM_VAL DT TC1 TC2
---------- ---------- ------- -------------------
2457105,96 2015-03-24 2457106 2015-03-14 23:12:14
0 4712-01-01 0000001 4712-01-00 00:00:00
0
#David, your suggestion seems to have worked like charm. For those who come along afterwards my code as updated follows:
SELECT trunc(cr.actual_start_date, 'hh') Start_Date, SUM(AA.SESSIONCPU) TotalCPU,
Count(1) Cnt, SUM((cr.Actual_Completion_Date - cr.Actual_Start_Date)*86400) TotalRun
FROM (SELECT Actual_Start_Date, Actual_Completion_Date, Oracle_Session_ID, Status_Code
FROM APPL.FND_CR
UNION ALL
SELECT Actual_Start_Date, Actual_Completion_Date, Oracle_Session_ID, Status_Code
FROM XX.E_FND_CR) cr
RIGHT OUTER JOIN PSTAT.A$_A AA ON cr.Oracle_Session_ID = AA.SessionID
WHERE trunc(cr.actual_start_date) >= to_date('28-Dec-2014', 'DD-MON-YYYY')
AND rownum <= 1048500
and cr.status_code = 'C'
GROUP BY trunc(cr.actual_start_date, 'hh')
ORDER BY 1;
Consider a table ABC which has a column of date type.
How can we get all the dates of a range (between start date and end date) which are not present in the table.
This can be done in PLSQL.I am searching a SQL query for it.
You need to generate the arbitrary list of dates that you want to check for:
http://hashfactor.wordpress.com/2009/04/08/sql-generating-series-of-numbers-in-oracle/
e.g.:
-- generate 1..20
SELECT ROWNUM N FROM dual
CONNECT BY LEVEL <= 20
Then left join with your table, or use a where not exists subquery (which will likely be faster) to fetch the dates amongst those you've generated that contains no matching record.
Assuming that your table's dates do not include a time element (ie. they are effectively recorded as at midnight), try:
select check_date
from (select :start_date + level - 1 check_date
from dual
connect by level <= 1 + :end_date - :start_date) d
where not exists
(select null from mytable where mydate = check_date)
Given a date column in order to do this you need to generate a list of all possible dates between the start and end date and then remove those dates that already exist. As Mark has already suggested the obvious way to generate the list of all dates is to use a hierarchical query. You can also do this without knowing the dates in advance though.
with the_dates as (
select date_col
from my_table
)
, date_range as (
select max(date_col) as maxdate, min(date_col) as mindate
from the_dates
)
select mindate + level
from date_range
connect by level <= maxdate - mindate
minus
select date_col
from the_dates
;
Here's a SQL Fiddle
The point of the second layer of the CTE is to have a "table" that has all the information you need but is only one row so that the hierarchical query will work correctly.