Multiple nested iif statement in Access - ms-access

Question

I am trying to calculate the number of vacation week an employee is entitled to using their years of service, with these categories:
0-4 years = 2 weeks
5-14 years = 3 weeks
15-24 years = 4 weeks
25 and up = 5 weeks
I found some examples and tried doing a nested iif statement but keep getting an error message. Can someone tell me what I am doing wrong?
VacationWeeks: IIf([YearsInService]<=4, "2",
IIf([YearsInService]is between 5 and 14, "3",
IIf([YearsInService]is between 15 and 24, "4",
IIf([YearsInService]>=25, "5", ”0”))))

Answer 1

You are likely receiving error messages because of two issues with your code:
A BETWEEN statement has the syntax:
expr [Not] Between value1 And value2
You should not include the word is:
IIf([YearsInService] is between 5 and 14,
^-------------------- this shouldn't be here
Your final else argument encloses the string in 'smart quotes' or Unicode character 0x201C:
IIf
(
[YearsInService] >= 25,
"5",
”0” <--- here
)
As opposed to the standard double-quote, which is Unicode/ASCII character 0x0022:
IIf
(
[YearsInService]>=25,
"5",
"0"
)
Correcting these two issues would yield an IIF statement such as:
IIf
(
[YearsInService] <= 4,
"2",
IIf
(
[YearsInService] between 5 and 14,
"3",
IIf
(
[YearsInService] between 15 and 24,
"4",
IIf
(
[YearsInService] >= 25,
"5",
"0"
)
)
)
)
However, you may find the use of a SWITCH statement more readable:
Switch
(
[YearsInService] <= 4, "2",
[YearsInService] <= 14, "3",
[YearsInService] <= 24, "4",
[YearsInService] > 24, "5",
True, "0"
)
The last test expression provides a catch-all default to account for nulls and still return a string value - I'll let you decide whether you wish to include or omit this, depending on the requirements of your application.