Please consider the table below for call center agent states.
What I need is to calculate the sum of time Bryan spent in "Break" for the whole day.
This is what I'm trying to execute but it returns some inaccurate values:
select sum (CASE
WHEN State = 'Not Working' and Reason = 'Break'
THEN Datediff(SECOND, [Time_Stamp], CURRENT_TIMESTAMP)
else '' END) as Break_Overall
from MyTable
where Agent = 'Bryan'
Use lead():
select agent,
sum(datediff(second, timestamp, next_timestamp)
from (select t.*,
lead(timestamp) over (partition by agent order by time_stamp) as next_timestamp
from mytable t
) t
where state = 'Not Working' and reason = 'Break'
group by agent;
If the agent can currently be on break, you might want a default value:
select agent,
sum(datediff(second, timestamp, next_timestamp)
from (select t.*,
lead(timestamp, 1, current_timestamp) over (partition by agent
order by time_stamp) as next_timestamp
from mytable t
) t
where state = 'Not Working' and reason = 'Break'
group by agent;
I'm a little uncomfortable with this logic, because current_timestamp has a date component, but your times don't.
EDIT:
In SQL Server 2008, you can do:
select agent,
sum(datediff(second, timestamp, coalesce(next_timestamp, current_timestamp))
from (select t.*, t2.timestamp as next_timestamp
from mytable t outer apply
(select top 1 t2.*
from mytable t2
where t2.agent = t.agent and t2.time_stamp > t.time_stamp
order by t.time_stamp
) t2
) t
where state = 'Not Working' and reason = 'Break'
group by agent;
As it is, you're getting the difference between the record's Time_Stamp and CURRENT_TIMESTAMP. That's probably not correct - you probably want to get the difference between the record's Time_Stamp and the next Time_Stamp for the same "Agent".
(Note that "Agent" will also present problems if you have multiple Agents with the same name; you probably want to store Agents in a different table and use a unique identifier as a foreign key.)
So, for Bryan, you'd get
the sum of both the "total time" for the 8:30:21 record AND the 11:34:58 record, which is right - except that you're calculating "total time" incorrectly, so instead you'd get the sum of the time since 8:30:21 and 11:34:58.
Related
I have a table on the database that contains statuses updated on each vehicle I have, I want to calculate how many days each vehicle spends time between two specific statuses 'Maintenance' and 'Read'.
My table looks something like this
and I want to result to be like this, only show the number of days a vehicle spends in maintenance before becoming ready on a specific day
The code I written looks like this
drop table if exists #temps1
select
VehicleId,
json_value(VehiclesHistoryStatusID.text,'$.en') as VehiclesHistoryStatus,
VehiclesHistory.CreationTime,
datediff(day, VehiclesHistory.CreationTime ,
lead(VehiclesHistory.CreationTime ) over (order by VehiclesHistory.CreationTime ) ) as days,
lag(json_value(VehiclesHistoryStatusID.text,'$.en')) over (order by VehiclesHistory.CreationTime) as PrevStatus,
case
when (lag(json_value(VehiclesHistoryStatusID.text,'$.en')) over (order by VehiclesHistory.CreationTime) <> json_value(VehiclesHistoryStatusID.text,'$.en')) THEN datediff(day, VehiclesHistory.CreationTime , (lag(VehiclesHistory.CreationTime ) over (order by VehiclesHistory.CreationTime ))) else 0 end as testing
into #temps1
from fleet.VehicleHistory VehiclesHistory
left join Fleet.Lookups as VehiclesHistoryStatusID on VehiclesHistoryStatusID.Id = VehiclesHistory.StatusId
where (year(VehiclesHistory.CreationTime) > 2021 and (VehiclesHistory.StatusId = 140 Or VehiclesHistory.StatusId = 144) )
group by VehiclesHistory.VehicleId ,VehiclesHistory.CreationTime , VehiclesHistoryStatusID.text
order by VehicleId desc
drop table if exists #temps2
select * into #temps2 from #temps1 where testing <> 0
select * from #temps2
Try this
SELECT innerQ.VehichleID,innerQ.CreationDate,innerQ.Status
,SUM(DATEDIFF(DAY,innerQ.PrevMaintenance,innerQ.CreationDate)) AS DayDuration
FROM
(
SELECT t1.VehichleID,t1.CreationDate,t1.Status,
(SELECT top(1) t2.CreationDate FROM dbo.Test t2
WHERE t1.VehichleID=t2.VehichleID
AND t2.CreationDate<t1.CreationDate
AND t2.Status='Maintenance'
ORDER BY t2.CreationDate Desc) AS PrevMaintenance
FROM
dbo.Test t1 WHERE t1.Status='Ready'
) innerQ
WHERE innerQ.PrevMaintenance IS NOT NULL
GROUP BY innerQ.VehichleID,innerQ.CreationDate,innerQ.Status
In this query first we are finding the most recent 'maintenance' date before each 'ready' date in the inner most query (if exists). Then calculate the time span with DATEDIFF and sum all this spans for each vehicle.
-- FIRST LOGIN DATE
WITH CTE_FIRST_LOGIN AS
(
SELECT
PLAYER_ID, EVENT_DATE,
ROW_NUMBER() OVER (PARTITION BY PLAYER_ID ORDER BY EVENT_DATE ASC) AS RN
FROM
ACTIVITY
),
-- CONSECUTIVE LOGINS
CTE_CONSEC_PLAYERS AS
(
SELECT
PLAYER_ID,
LEAD(EVENT_DATE,1) OVER (PARTITION BY EVENT_DATE ORDER BY EVENT_DATE) NEXT_DATE
FROM
ACTIVITY A
JOIN
CTE_FIRST_LOGIN C ON A.PLAYER_ID = C.PLAYER_ID
WHERE
NEXT_DATE = DATEADD(DAY, 1, A.EVENT_DATE) AND C.RN = 1
GROUP BY
A.PLAYER_ID
)
-- FRACTION
SELECT
NULLIF(ROUND(1.00 * COUNT(CTE_CONSEC.PLAYER_ID) / COUNT(DISTINCT PLAYER_ID), 2), 0) AS FRACTION
FROM
ACTIVITY
JOIN
CTE_CONSEC_PLAYERS CTE_CONSEC ON CTE_CONSEC.PLAYER_ID = ACTIVITY.PLAYER_ID
I am getting the following error when I run this query.
[42S22] [Microsoft][ODBC Driver 17 for SQL Server][SQL Server]Invalid column name 'NEXT_DATE'. (207) (SQLExecDirectW)
This is a leetcode medium question 550. Game Play Analysis IV. I wanted to know why it can't identify the column NEXT_DATE here and what am I missing? Thanks!
The problem is in this CTE:
-- CONSECUTIVE LOGINS prep
CTE_CONSEC_PLAYERS AS (
SELECT
PLAYER_ID,
LEAD(EVENT_DATE,1) OVER (PARTITION BY EVENT_DATE ORDER BY EVENT_DATE) NEXT_DATE
FROM ACTIVITY A
JOIN CTE_FIRST_LOGIN C ON A.PLAYER_ID = C.PLAYER_ID
WHERE NEXT_DATE = DATEADD(DAY, 1, A.EVENT_DATE) AND C.RN = 1
GROUP BY A.PLAYER_ID
)
Note that you are creating NEXT_DATE as a column alias in this CTE but also referring to it in the WHERE clause. This is invalid because by SQL clause-ordering rules the NEXT_DATE column alias does not exist until you get to the ORDER BY clause which is the last evaluated clause in a SQL query or subquery. You don't have an ORDER BY clause in this subquery, so technically the NEXT_DATE column alias only exists to [sub]queries that both come after and reference your CTE_CONSEC_PLAYERS CTE.
To fix this you'd probably want two CTEs like this (untested):
-- CONSECUTIVE LOGINS
CTE_CONSEC_PLAYERS_pre AS (
SELECT
PLAYER_ID,
RN,
EVENT_DATE,
LEAD(EVENT_DATE,1) OVER (PARTITION BY EVENT_DATE ORDER BY EVENT_DATE) NEXT_DATE
FROM ACTIVITY A
JOIN CTE_FIRST_LOGIN C ON A.PLAYER_ID = C.PLAYER_ID
)
-- CONSECUTIVE LOGINS
CTE_CONSEC_PLAYERS AS (
SELECT
PLAYER_ID,
MAX(NEXT_DATE) AS NEXT_DATE,
FROM CTE_CONSEC_PLAYERS_pre
WHERE NEXT_DATE = DATEADD(DAY, 1, EVENT_DATE) AND RN = 1
GROUP BY PLAYER_ID
)
You gave every table an alias (for example JOIN CTE_FIRST_LOGIN C has the alias C), and every column access is via the alias. You need to add the correct alias from the correct table to NEXT_DATE.
Your primary issue is that NEXT_DATE is a window function, and therefore cannot be referred to in the WHERE because of SQL's order of operations.
But it seems this query is over-complicated.
The problem to be solved appears to be: how many players logged in the day after they first logged in, as a percentage of all players.
This can be done in a single pass (no joins), by using multiple window functions together:
WITH CTE_FIRST_LOGIN AS (
SELECT
PLAYER_ID,
EVENT_DATE,
ROW_NUMBER() OVER (PARTITION BY PLAYER_ID ORDER BY EVENT_DATE) AS RN,
-- if EVENT_DATE is a datetime and can have multiple per day then group by CAST(EVENT_DATE AS date) first
LEAD(EVENT_DATE, 1) OVER (PARTITION BY EVENT_DATE ORDER BY EVENT_DATE) AS NextDate
FROM ACTIVITY
),
BY_PLAYERS AS (
SELECT
c.PLAYER_ID,
SUM(CASE WHEN c.RN = 1 AND c.NextDate = DATEADD(DAY, 1, c.EVENT_DATE)
THEN 1 END) AS IsConsecutive
FROM CTE_FIRST_LOGIN AS c
GROUP BY c.PLAYER_ID
)
SELECT ROUND(
1.00 *
COUNT(c.IsConsecutive) /
NULLIF(COUNT(*), 0)
,2) AS FRACTION
FROM BY_PLAYERS AS c;
You could theoretically merge BY_PLAYERS into the outer query and use COUNT(DISTINCT but splitting them feels cleaner
Assuming that, I have a table something like this :
EmployeeCode
EntryType
TIME
ABC200413
IN
8:48AM
ABC200413
OUT
4:09PM
ABC200413
IN
4:45PM
ABC200413
OUT
6:09PM
ABC200413
IN
7:45PM
ABC200413
OUT
10:09PM
Now I want to convert my data something like this :
EmployeeCode
IN_TIME
OUT_TIME
ABC200413
8:48AM
4:09PM
ABC200413
4:45PM
6:09PM
ABC200413
7:45PM
10:09PM
Is there any way I can achieve this using SQL server query?
Thanks in advance.
Provided mytable contains only valid pairs of in / out events
select EmployeeCode,
max(case EntryType when 'IN' then TIME end ) IN_TIME,
max(case EntryType when 'OUT' then TIME end ) OUT_TIME
from (
select EmployeeCode, EntryType, TIME,
row_number() over(partition by EmployeeCode, EntryType order by TIME) rn
from mytable
)t
group by EmployeeCode, rn
order by EmployeeCode, rn
Otherwise a kind of clean-up is required first.
One solution that may work is using inner joins .. as you may have multiple In & Out records.
Select A.EmployeeCode,
Min(TIME) IN_TIME,
(Select Max(A2.TIME) From Attendance A2 Where A2.EmployeeCode = A.EmployeeCode And A2.EntryType = 'OUT') OUT_TIME
From Attendance A
Where A.EntryType = 'IN'
Group By A.EmployeeCode
So, The main query get the max Out time for each employee & the inner query get the min In time. That solution supposes that at least each employee has one IN record
Assuming there are always pairs of IN/OUT, you can use LEAD to get the next value
select
EmployeeCode,
TIME as IN_TIME,
nextTime AS OUT_TIME
from (
select *,
lead(case EntryType when 'OUT' then TIME end) over (partition by EmployeeCode order by TIME) nextTime
from mytable
) t
where EntryType = 'IN';
I'm trying to use a nested aggregate function. I know that SQL does not support it, but I really need to do something like the below query. Basically, I want to count the number of users for each day. But I want to only count the users that haven't completed an order within a 15 days window (relative to a specific day) and that have completed any order within a 30 days window (relative to a specific day). I already know that it is not possible to solve this problem using a regular subquery (it does not allow to change subquery values for each date). The "id" and the "state" attributes are related to the orders. Also, I'm using Fivetran with Snowflake.
SELECT
db.created_at::date as Date,
count(case when
(count(case when (db.state = 'finished')
and (db.created_at::date between dateadd(day,-15,Date) and dateadd(day,-1,Date)) then db.id end)
= 0) and
(count(case when (db.state = 'finished')
and (db.created_at::date between dateadd(day,-30,Date) and dateadd(day,-16,Date)) then db.id end)
> 0) then db.user end)
FROM
data_base as db
WHERE
db.created_at::date between '2020-01-01' and dateadd(day,-1,current_date)
GROUP BY Date
In other words, I want to transform the below query in a way that the "current_date" changes for each date.
WITH completed_15_days_before AS (
select
db.user as User,
count(case when db.state = 'finished' then db.id end) as Completed
from
data_base as db
where
db.created_at::date between dateadd(day,-15,current_date) and dateadd(day,-1,current_date)
group by User
),
completed_16_days_before AS (
select
db.user as User,
count(case when db.state = 'finished' then db.id end) as Completed
from
data_base as db
where
db.created_at::date between dateadd(day,-30,current_date) and dateadd(day,-16,current_date)
group by User
)
SELECT
date(db.created_at) as Date,
count(distinct case when comp_15.completadas = 0 and comp_16.completadas > 0 then comp_15.user end) as "Total Users Churn",
count(distinct case when comp_15.completadas > 0 then comp_15.user end) as "Total Users Active",
week(Date) as Week
FROM
data_base as db
left join completadas_15_days_before as comp_15 on comp_15.user = db.user
left join completadas_16_days_before as comp_16 on comp_16.user = db.user
WHERE
db.created_at::date between '2020-01-01' and dateadd(day,-1,current_date)
GROUP BY Date
Does anyone have a clue on how to solve this puzzle? Thank you very much!
The following should give you roughly what you want - difficult to test without sample data but should be a good enough starting point for you to then amend it to give you exactly what you want.
I've commented to the code to hopefully explain what each section is doing.
-- set parameter for the first date you want to generate the resultset for
set start_date = TO_DATE('2020-01-01','YYYY-MM-DD');
-- calculate the number of days between the start_date and the current date
set num_days = (Select datediff(day, $start_date , current_date()+1));
--generate a list of all the dates from the start date to the current date
-- i.e. every date that needs to appear in the resultset
WITH date_list as (
select
dateadd(
day,
'-' || row_number() over (order by null),
dateadd(day, '+1', current_date())
) as date_item
from table (generator(rowcount => ($num_days)))
)
--Create a list of all the orders that are in scope
-- i.e. 30 days before the start_date up to the current date
-- amend WHERE clause to in/exclude records as appropriate
,order_list as (
SELECT created_at, rt_id
from data_base
where created_at between dateadd(day,-30,$start_date) and current_date()
and state = 'finished'
)
SELECT dl.date_item
,COUNT (DISTINCT ol30.RT_ID) AS USER_COUNT
,COUNT (ol30.RT_ID) as ORDER_COUNT
FROM date_list dl
-- get all orders between -30 and -16 days of each date in date_list
left outer join order_list ol30 on ol30.created_at between dateadd(day,-30,dl.date_item) and dateadd(day,-16,dl.date_item)
-- exclude records that have the same RT_ID as in the ol30 dataset but have a date between 0 amd -15 of the date in date_list
WHERE NOT EXISTS (SELECT ol15.RT_ID
FROM order_list ol15
WHERE ol30.RT_ID = ol15.RT_ID
AND ol15.created_at between dateadd(day,-15,dl.date_item) and dl.date_item)
GROUP BY dl.date_item
ORDER BY dl.date_item;
Given this table:
How can I get the datediff in days between each status_date for each group of ID_Number? In other words I need to find the number of elapsed days for each status that the ID_Number has been given.
Some things to know:
All ID_Number will have a received_date which should be the earliest date for each ID_Number (but app doesn't enforce)
For each ID_Number there will be a status with a corresponding status_date which is the date that the ID_Number was given that particular status.
The status column doesn't always necessarily go in the same order every time (app doesn't enforce)
All ID_Number will have a closed_date which should be the latest date (but app doesn't enforce)
Sample output:
So for ID_Number 2001, the first date (received_date) is 2009-05-02 and the next date you encounter has a status of 'open' and is 2009-05-02 so elapsed days is 0. Moving on to the next date encountered is 2009-05-10 with a status of 'invest' and the elapsed days is 8 counting from the prior date. The next date encountered is 2009-07-11 and the elapsed days is 62 counting from the previous date.
Edited to add:
Is it possible to have the elapsed days end up as a column on this table/view?
I also forgot to add that this is SQL Server 2000.
What I understand is that you need the difference between the first status_date and the next status_date for the same id and so on up to the closed_date.
This will only work in SQL 2005 and up.
;with test as (
select
key,
id_number,
status,
received_date,
status_date,
closed_date,
row_number() over (partition by id order by status_date, key ) as rownum
from #test
)
select
t1.key,
t1.id_number,
t1.status,
t1.status_date,
t1.received_date,
t1.closed_date,
datediff(d, case when t1.rownum = 1
then t1.received_date
else
case when t2.status_date is null
then t1.closed_date
else t2.status_date
end
end,
t1.status_date
) as days
from test t1
left outer join test t2
on t1.id = t2.id
and t2.rownum = t1.rownum - 1
This solution will work with SQL 2000 but I am not sure how good will perform:
select *,
datediff(d,
case when prev_date is null
then closed_date
else prev_date
end,
status_date )
from (
select *,
isnull( ( select top 1 t2.status_date
from #test t2
where t1.id_number = t2.id_number
and t2.status_date < t1.status_date
order by t2.status_date desc
),received_date) as prev_date
from #test t1
) a
order by id_number, status_date
Note: Replace the #Test table with the name of your table.
Some sample output would really help, but this is a guess at what you mean, assuming you want that information for each ID_Number/Status combination:
select ID_Number, Status, EndDate - StartDate as DaysElapsed
from (
select ID_Number, Status, min(coalesce(received_date, status_date)) as StartDate, max(coalesce(closed_date, status_date)) as EndDate
from Table1
group by ID_Number, Status
) a
The tricky bit is determining the previous status and putting it on the same row as the current status. It would be simplified a little if there were a correlation between Key and StatusDate (i.e. that Key(x) > Key(y) always implies StatusDate(x) >= StatusDate(y)). Unfortunately, that doesn't seem to be the case.
PS: I am assuming Key is a unique identifier on your table; you haven't said anything to indicate otherwise.
SELECT Key,
ID_Number,
(
SELECT TOP 1 Key
FROM StatusUpdates prev
WHERE (prev.ID_Number = cur.ID_Number)
AND ( (prev.StatusDate < cur.StatusDate)
OR ( prev.StatusDate = cur.StatusDate
AND prev.Key < cur.Key
)
)
ORDER BY StatusDate, Key /*Consider index on (ID_Number, StatusDate, Key)*/
) PrevKey
FROM StatusUpdates cur
Once you have this as a basis, it's easy to extrapolate to any other info you need from the current or previous StatusUpdate. E.g.
SELECT c.*,
p.Status AS PrevStatus,
p.StatusDate AS PrevStatusDate,
DATEDIFF(d, c.StatusDate, p.StatusDate) AS DaysElapsed
FROM (
SELECT Key,
ID_Number,
Status,
SattusDate,
(
SELECT TOP 1 Key
FROM StatusUpdates prev
WHERE (prev.ID_Number = cur.ID_Number)
AND ( (prev.StatusDate < cur.StatusDate)
OR ( prev.StatusDate = cur.StatusDate
AND prev.Key < cur.Key
)
)
ORDER BY StatusDate, Key
) PrevKey
FROM StatusUpdates cur
) c
JOIN StatusUpdates p ON
p.Key = c.PrevKey