How to Apply Conditional Logic to Where Statement - sql

Question

I can't seem to figure out how to set the logic up for my particular problem. I'm trying to count the number of times the word "Service" appears but only when the RECORD_CODE is INCIDENT. When the RECORD is INCIDENT-UPDATE, it is normally already somewhere else as an INCIDENT so I exclude them to keep from duplicating my data.
However, there are a small number of cases where the SUBMIT_METHOD is "WEB" and the only record is an INCIDENT_UPDATE and I cannot figure out how to look only where the RECORD = 'INCIDENT' unless the particular record has a SUBMIT_METHOD of "WEB" and there is no record for that report # with a RECORD of INCIDENT. It could be a simple problem and I'm just overthinking it but I cannot think of how to do it. Any help would be GREATLY appreciated!
My query:
SELECT column2, count(*) as 'COUNT'
from Service.Table
where date between '1/1/17' and '1/31/17'
and column1 = 'Issue'
and RECORD = 'INCIDENT'
group by column2
Sample of the data:
REPORT # RECORD SUBMIT_METHOD SUBMIT_DATE COLUMN2
1234 Incident Web 1/1/2017 Service
1234 Incident-Update Web 1/1/2017 Service
1235 Incident Phone 1/15/2017 Other
1235 Incident-Update Phone 1/15/2017 Other
1236 Incident-Update Web 1/18/2017 Service
The expected output in this case would be:
COLUMN2 COUNT
Service 3
If I can provide any other info just let me know!

Answer 1

You are looking for a group by like
select column2, count(*)
from tbl1
where SUBMIT_METHOD = 'Web'
group by column2;

Answer 2

;With cte(REPORT#,RECORD ,SUBMIT_METHOD,SUBMIT_DATE,COLUMN2)
AS
(
SELECT 1234,'Incident' ,'Web' , '1/1/2017' ,'Service' Union all
SELECT 1234,'Incident-Update' ,'Web' , '1/1/2017' ,'Service' Union all
SELECT 1235,'Incident' ,'Phone', '1/15/2017', 'Other' Union all
SELECT 1235,'Incident-Update' ,'Phone', '1/15/2017', 'Other' Union all
SELECT 1236,'Incident-Update' ,'Web' , '1/18/2017', 'Service'
)
SELECT COLUMN2
,CountCOLUMN2
FROM (
SELECT *
,COUNT(COLUMN2) OVER (
PARTITION BY COLUMN2 ORDER BY COLUMN2
) CountCOLUMN2
,ROW_NUMBER() OVER (
PARTITION BY COLUMN2 ORDER BY COLUMN2
) Seq
FROM cte
) Dt
WHERE SUBMIT_DATE BETWEEN '1/1/17'
AND '1/31/17'
AND RECORD = 'INCIDENT'
ORDER BY 1 DESC
OutPut
COLUMN2 CountCOLUMN2
--------------------
Service 3
Other 2

Answer 3

You could use not exists subquery to ensure there is no other row with the same Report# and a record type of INCIDENT:
select *
from Service.Table t1
where date between '1/1/17' and '1/31/17' and
column1 = 'Issue' and
(
record = 'Incident' or
(
record = 'Incident-Update' and
submit_method = 'Web' and
not exist
(
select *
from Service.Table t2
where t2.record = 'INCIDENT'
and t2.[Report #] = t1.[Report #]
)
)
)