How do I get the night/day shift first in and last out with multiple records?

Question

0.00/5 (No votes)

See more:

How do i get the records of my night and day shift with multiple records in attendance.

Verify_State identify when 0 = Time in and 1 = Time out

What i have tried Queries are here in this. Fiddle[^]

Where the problem is the user_id of 14 is a day shift and the user_id of 15 is night shift that i can't get the attendance correctly.

Exptected Output :

user_id  verify_date      verify_state  prev_state  next_state    next_date
14    2019-11-05 07:23:00       0           1           1   2019-11-05 20:00:00
14    2019-11-06 07:23:00       0           1           0   2019-11-07 20:09:00
14    2019-11-08 07:18:00       0           1           1   2019-11-08 17:38:00
14    2019-11-11 07:20:00       0           1           1   2019-11-11 20:05:00
15    2019-11-12 19:57:00       0           1           0   2019-11-13 07:20:00

What I have tried:

This is the Query i have tried :

with 
cte1 as ( select *, 
                 coalesce(lag(verify_state) over (partition by user_id order by verify_date asc),1) prev_state,
                 coalesce(lead(verify_state) over (partition by user_id order by verify_date asc),0) next_state
          from tbl_excel_attendance
),
cte2 as ( select *, 
                 lead(verify_date) over (partition by user_id order by verify_date asc) next_date
          from cte1 
          where (prev_state,verify_state,next_state) in ( (1,0,0),(1,0,1), (0,1,0) )
)
select * 
from cte2 
where verify_state = 0
  and next_date is not null
order by 2,3

but if the records was so many it will not get the right record should it be. like the expected output.

Posted 14-Nov-19 16:12pm

Bip baaap

Updated 15-Nov-19 0:14am

v2

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

CHill60 · Answer 1 · 2019-11-15T00:15:00

The shift is not what is stopping you getting the query correct, it's the underlying data.
For example look at employee 14's first 6 records in chronological order:

user_id	verify_date	verify_state
14	2019-11-05 07:23:00.000	0
14	2019-11-05 20:00:00.000	1
14	2019-11-06 07:23:00.000	0
14	2019-11-06 19:32:00.000	0
14	2019-11-07 07:25:00.000	0
14	2019-11-07 07:25:00.000	0

Employee 14 did not clock out between 2019-11-06 07:23:00.000 and 2019-11-06 19:32:00.000. I.e the pattern is IN,OUT,IN,IN,IN,IN.

You are going to have to make some decisions about what to do when the clocking out data is not available.

E.g. assume a maximum shift length and derive a sequence of IN,OUT,IN,OUT inserting missing OUT records with assumed values.

To use that method create a sequence (use a CTE or temporary table) of expected shift start and end dates and times covering the entire range of dates and times you are interested in. Manas gives some examples in this Tip - Generating a Sequence in SQL[^]
Then use that sequence with a left outer join to the data you do have or insert the missing data into your base table