Question

OK, the title is confusing but let me explain.
Let’s say that I have a employee skills database for which I would like managers to be able to search through.

A manager may want to search for employees with nunchuck skills…
Ok, great, thats easy:

SELECT * FROM skilllist WHERE skillname= "nunchuck"

Bam! I got a list of employees with nunchuck skills.

But say a manager would like to get a list of employees with both “nunchuck” skills and “bow staff” skills. How can I create a query like that? I can’t just say:

SELECT * FROM skilllist WHERE skillname= "nunchuck" AND skillname= "bow staff"

or

SELECT * FROM skilllist WHERE skillname= "nunchuck" OR skillname= "bow staff"

The latter would just return all employees with nunchuck skills and all employees with bow staff skills. I would like to get ONLY employees with both skills. I can’t figure it out. Please help! 🙂

Answer 1

select * from employees where 
employeeID in (select memberID from skilllist where skillname = 'nunchuck') and 
employeeID in (select memberID from skilllist where skillname = 'bow staff')