How can I get T-SQL to include correct data from last month - tsql

Question

In the below query I return data for past 5 months, unfortunately I can not get it to include correct count from current month (June 2021), it ruturns 0 where as it should have returned 2 since I have 2 entries with StartDate 14-06-2021 and 17-06-2021 which should have been in this count.. How can I fix this?.
The output I get (missing 2 in month 6)
year month EmployeeStartet
2021 2 8
2021 3 0
2021 4 0
2021 5 4
2021 6 0
My Query
declare #thismonth1 as Date = DateAdd(
d,
1 - DatePart(d, CURRENT_TIMESTAMP),
CURRENT_TIMESTAMP
);
declare #lastMonth1 as Date = DateAdd(
d,
1 - DatePart(d, CURRENT_TIMESTAMP),
CURRENT_TIMESTAMP
);
declare #firstMonth1 as Date = DateAdd(m, -4, #lastMonth1);
WITH months AS (
SELECT
#firstMonth1 AS thisMonth
UNION ALL
SELECT
DateAdd(m, 1, thisMonth) AS thisMonth
FROM
months
WHERE
thisMonth < #lastMonth1
),
data AS (
SELECT
YEAR(StartDate) year,
MONTH(StartDate) month,
COUNT(StartDate) EmployeeStartet
FROM
EFP_EmploymentUser
WHERE
EmployType = 'fixed'
AND StartDate BETWEEN #firstmonth1
AND #thismonth1
GROUP BY
YEAR(StartDate),
MONTH(StartDate)
)
SELECT
YEAR(m.thisMonth) AS year,
MONTH(m.thisMonth) AS month,
ISNULL(d.EmployeeStartet, 0) AS EmployeeStartet
FROM
months m
LEFT OUTER JOIN data d ON d.year = YEAR(m.thisMonth)
AND d.month = MONTH(m.thisMonth)
ORDER BY
m.thisMonth ASC;

Answer 1

Try
declare #thismonth1 as Date = DateAdd(d, 1 - DatePart(d, CURRENT_TIMESTAMP), CURRENT_TIMESTAMP);
declare #lastMonth1 as Date = DateAdd(d, 1 - DatePart(d, CURRENT_TIMESTAMP), CURRENT_TIMESTAMP);
declare #firstMonth1 as Date = DateAdd(m, -4, #lastMonth1);
select #thismonth1, #lastMonth1, #firstMonth1;
This gives you
#thismonth1
#lastMonth1
#firstMonth1
2021-06-01
2021-06-01
2021-02-01
Correct #lastMonth1 and your query will run just fine. You can use EOMONTH for this.