Finding dates within one year of each other - ms-access

Question

I am trying to determine the number of employees who left the company within 1 year of being hired:
SELECT
Min(O896IA_VEMPPRSA.EMP_RHR_DT) AS MinOfEMP_RHR_DT,
Max(O867IA_VJOBHST.REC_EFF_STT_DT) AS MaxOfREC_EFF_STT_DT,
O896IA_VEMPPRSA.SYS_EMP_ID_NR
FROM O896IA_VEMPPRSA
INNER JOIN O867IA_VJOBHST
ON O896IA_VEMPPRSA.SYS_EMP_ID_NR = O867IA_VJOBHST.SYS_EMP_ID_NR
WHERE
O867IA_VJOBHST.EMP_ACN_TYP_CD="TER"
GROUP BY
O896IA_VEMPPRSA.SYS_EMP_ID_NR;
EMP_RHR_DT is the original hire date, and REC_EFF_STT_DT is the date they quit/were fired. Again I need the REC_EFF_STT_DT to be within 365 days of the EMP_RHR_DT. Any thoughts?
Example of RHR Date Changes. IN some cases there will only be one job but still a negative days worked, in other cases it is because it is selecting the wrong job.
Job MinOfEMP_RHR_DT MaxOfREC_EFF_STT_DT daysworked SYS_EMP_ID_NR
abc1 10/24/2012 4/15/2013 173 123456
abc1 4/25/2013 4/13/2013 -12 234567
abc3 7/8/2013 1/4/2013 -185 891234
abc4 7/8/2013 7/29/2013 21 891234

Answer 1

Assuming O896IA_VEMPPRSA is master table and O867IA_VJOBHST is detail table with the following data:
O896IA_VEMPPRSA:
ID EMP_RHR_DT SYS_EMP_ID_NR Empname
1 8/10/2012 1 John
2 10/10/2012 2 Matthew
O867IA_VJOBHST:
ID SYS_EMP_ID_NR EMP_ACN_TYP_CD REC_EFF_STT_DT
1 1 Married 1/1/2003
2 1 Became dad 8/1/2003
3 1 TER 9/10/2013
5 2 Remarried 1/1/2003
6 2 Remarried 8/1/2003
7 2 TER 9/10/2013
You could do this to get the number of days worked:
SELECT
Min(O896IA_VEMPPRSA.EMP_RHR_DT) AS MinOfEMP_RHR_DT,
Max(O867IA_VJOBHST.REC_EFF_STT_DT) AS MaxOfREC_EFF_STT_DT,
Max(O867IA_VJOBHST.REC_EFF_STT_DT) - Min(O896IA_VEMPPRSA.EMP_RHR_DT) as daysworked,
O896IA_VEMPPRSA.SYS_EMP_ID_NR
FROM O896IA_VEMPPRSA
INNER JOIN O867IA_VJOBHST
ON O896IA_VEMPPRSA.SYS_EMP_ID_NR = O867IA_VJOBHST.SYS_EMP_ID_NR
WHERE
O867IA_VJOBHST.EMP_ACN_TYP_CD="TER"
GROUP BY
O896IA_VEMPPRSA.SYS_EMP_ID_NR;
HAVING
(Max(O867IA_VJOBHST.REC_EFF_STT_DT) - Min(O896IA_VEMPPRSA.EMP_RHR_DT)) < 365;

Answer 2

The solution is with the datediff function. You will end up with a constraint like:
WHERE DateDiff("yyyy",hiringDate, endingDate)<1
Please check the exact syntax for the DateDiff function in the MS-Access help