SQL to return 1 for each row with column range in 2017 or 2018 or 2019 - sql

Question

I have a query that looks like this:
SELECT DISTINCT
p.person_ID
,p.Last_Name
,ISNULL(p.Middle_Initial, '') AS Middle
,p.First_Name
,sh.Status_from_date
,sh.Status_thru_date
--(a)
FROM
person p
INNER JOIN
Person_Facilities f ON p.Person_ID = f.Person_ID
LEFT OUTER JOIN
rv_person_status_hist sh ON p.person_ID = sh.person_ID
ORDER BY
Last_Name
The returned data looks like this sort of thing (ignore the 2018 column for now):
Person_id Last_Name Middle First_Name Status_from_date Status_thru_date 2018
8000 Skywalker Dude Luke Null 2010-01-28 07:38 1
9000 Yoda Phinnius 2017-06-01 00:00 2019-05-31 00:00 1
1000 Lamb Little Mary 2018-07-01 00:00 2020-06-30 00:00 1
2000 Spider Bitsy Itsy 2016-11-01 00:00 2017-06-30 00:00 1
How do I add a column, say [2018], and put a 1 for if status_from_date to status_thru_date is in 2018, or a 0 if not?
I wanted to add the following at the --(a) in the query:
,(SELECT case
when exists
(
select * --
FROM dbo.RV_Person_status_hist
where
status_from_date is not null
and
('1-1-2018' between status_from_date and status_thru_date)
and status_from_date is not null
)
then 1 else 0 end )
AS [2018]
This doesn't seem to be working, though. See the 2018 column in the above table. It's showing 1 for all returned, and it's not excluding nulls. It's pretty complicated. status_from and status_thru could fall with 2018 in it, or 2018 could be inside status_from and status_thru, which should both be 1.
How do I exclude the nulls, and how do I show a 1 when the status date includes 2018?
I've looked at range within range, and return 0 or 1. I don't think I have all cases since the ranges overlap as well.
**Update:
I tried adding this at --(a) above instead, per the potential answer below:
,(SELECT status_from_date, status_thru_date,
case
when datepart(year, status_from_date)='2018'
or datepart(year, status_thru_date)='2018'
or (
status_from_date <= '01/01/2018'
and status_thru_date >= '12/12/2018'
)
then 1
else 0
end) AS [2018]
but I'm getting Ambiguous column name 'status_from_date'. Ambiguous
column name 'status_thru_date'. Only one expression can be specified
in the select list when the subquery is not introduced with EXISTS.
Any ideas? Figured it out.
**Update 2: How about this?
,(case when (
(
(sh.status_from_date is null or sh.status_from_date <= '2017-01-01') and
(sh.status_thru_date is null or sh.status_thru_date >= '2017-12-31')
)
or
(
(f.status_from_date is null or f.status_from_date <= '2017-01-01') and
(f.status_thru_date is null or f.status_thru_date >= '2017-12-31')
)
or
(
(datepart(year, sh.status_from_date)='2017') or
(datepart(year, sh.status_thru_date)='2017') or
(datepart(year, f.status_from_date)='2017') or
(datepart(year, f.status_from_date)='2017')
)
and
p.Sex='M'
)
then 1 else 0
end) as [2017_Male]
,(case when (
(
(sh.status_from_date is null or sh.status_from_date <= '2017-01-01') and
(sh.status_thru_date is null or sh.status_thru_date >= '2017-12-31')
)
or
(
(f.status_from_date is null or f.status_from_date <= '2017-01-01') and
(f.status_thru_date is null or f.status_thru_date >= '2017-12-31')
)
or
(
(datepart(year, sh.status_from_date)='2017') or
(datepart(year, sh.status_thru_date)='2017') or
(datepart(year, f.status_from_date)='2017') or
(datepart(year, f.status_from_date)='2017')
)
and
p.Sex='F'
)
then 1 else 0
end) as [2017_Female]--------
That one is putting a 1 in the 2017 column for both male and female for the data of: status_from: 2014-10-01 and status_to: 2016-09-30

Answer 1

You could do something like this:
while would be to check if start or end contains 2018, or if the date is between start and thru
CREATE TABLE #testTable (
Status_from_date DATETIME,
Status_thru_date DATETIME
)
INSERT INTO #testTable (
Status_from_date,
Status_thru_date
)
VALUES (
'2017-06-01 00:00',
'2019-05-31 00:00'
),
(
NULL,
'2010-01-28 07:38'
),
(
'2018-07-01 00:00',
'2020-06-30 00:00'
)
SELECT Status_from_date,
Status_thru_date,
CASE
WHEN datepart(year, Status_from_date) = '2018'
OR datepart(year, Status_thru_date) = '2018'
OR (
Status_from_date <= '01/01/2018'
AND Status_thru_date >= '12/12/2018'
)
THEN 1
ELSE 0
END AS '2018'
FROM #testTable
DROP TABLE #testTable
which produces:
Status_from_date Status_thru_date 2018
2017-06-01 00:00:00.000 2019-05-31 00:00:00.000 1
NULL 2010-01-28 07:38:00.000 0
2018-07-01 00:00:00.000 2020-06-30 00:00:00.000 1

Answer 2

If you want any overlaps in 2018, then:
(case when (status_from_date is null or status_from_date < '2019-01-01') and
(status_to_date is null or status_to_date >= '2018-01-01')
then 1 else 0
end) as is_2018
If you want overlaps of the complete year:
(case when (status_from_date is null or status_from_date <= '2018-01-01') and
(status_to_date is null or status_to_date >= '2018-12-31')
then 1 else 0
end) as is_2018