show employees' salary history by adding StartingSalary and Increase values Access - sql

Question

On a form, I have a chart that shows the Increase History of each employee (What rating they were given each year, and how much of an increase they got)
I can't post an image since I have less than 10 reputation, but I hope it's clear.
What I need is a similar graph, but for the history of each employee's salary. I have a StartingSalary field in IncreaseEmployeesQ, and an Increase field. It's complicated, all I've managed to do is this:
SELECT IncreaseEmployeesQ.LocalID, Sum([Increase]+[StartingSalary]) AS CurrentSalary
FROM IncreaseEmployeesQ
GROUP BY IncreaseEmployeesQ.LocalID;
But what this does is add the StartingSalary each time, since it's repeated in each year. and it gives me one value for each employee, instead of one value for each year so I can have a chart that tracks the progress of the employee's salary.
I tried going to the original IncreaesT instead of the query that has it and EmployeesT (IncreaseEmployeesQ), thinking maybe I can have a calculated field if I add a StartingSalary field in IncreaseT (It's originally in EmployeesT) and then link it in relationships and enforce referential integrity, but I kept getting an error message. After some research I gathered that the reason is because the two tables have different Primary keys, so I resorted to the Query.
Is the chart I'm aiming to get to even possible? a chart that shows how each employee's salary has been progressing since 2010? (that's as far back as my data goes)
-assuming that a query is the right way to get this done- The query I'm working on looks like this:
LocalID Increase Years StartingSalary
1 1000 2013 7000
1 500 2014 7000
1 0 2015 7000
1 500 2016 7000
2 0 2013 5000
2 500 2014 5000
2 500 2015 5000
2 0 2016 5000
What I want it to look like (so I make a chart later) is this:
LocalID Increase Years StartingSalary CurrentSalary
1 1000 2013 7000 8000
1 500 2014 7000 8500
1 0 2015 7000 8500
1 500 2016 7000 9000
2 0 2013 5000 5000
2 500 2014 5000 5500
2 500 2015 5000 6000
2 0 2016 5000 6000
If it turns out like this, I can make a chart that has the Years and the CurrentSalary for each employee.
But all I've managed to do is the code above, which gives me this result
LocalID Increase Years StartingSalary CurrentSalary
1 1000 2013 7000 30000
1 500 2014 7000 30000
1 0 2015 7000 30000
1 500 2016 7000 30000
2 0 2013 5000 21000
2 500 2014 5000 21000
2 500 2015 5000 21000
2 0 2016 5000 21000
I hope everything is clear now

Answer 1

You want a cumulative sum. One way to do this in MS Access uses a correlated subquery:
SELECT ieq.*,
(ieq.StartingSalary +
(SELECT SUM(increase)
FROM IncreaseEmployeesQ as ieq2
WHERE ieq2.LocalID = ieq.LocalId AND ieq2.Years <= ieq.Years
)
) as CurrentSalary
FROM IncreaseEmployeesQ as ieq