Using Functions with WHERE clause

Hello Experts,
How can I use a function with WHERE clause in SQL statement?  The Function is going to return a Boolean value True or False.  Please see below for details.  Thank you very much in advance.

SELECT FIRST_NAME, LAST_NAME FROM EmployeeMaster WHERE FunDepartment(EMPLOYEE_ID) = 'Finance'

Thank you,
SB
RadhaKrishnaKiJayaAsked:
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Ryan ChongBusiness Systems Analyst , ex-Senior Application EngineerCommented:
pls post the scripts of Function FunDepartment ?

I guess you may mean this instead?

SELECT FIRST_NAME, LAST_NAME FROM EmployeeMaster WHERE FunDepartment(EMPLOYEE_ID, 'Finance') = 1 ' or 0

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which interpret as to get the First Name and Last Name of an employee based on his/her Employee ID and determine whether currently he/she is in/not in the Finance department.

Hence, we probably need to modify the Function FunDepartment accordingly

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RadhaKrishnaKiJayaAuthor Commented:
Thank you very much for your help.  It worked.  Thank you again!
PortletPaulEE Topic AdvisorCommented:
Just a cautionary note on using functions in the where clause;
doing this can make queries very slow and/or add significant loads on CPU.

It may make your SQL query code neat and tidy, but you can pay dearly for that. Be wary.
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