Strugling to write what should be a simple select!!

Hi All,

Read my out of date book, tried to dredge my ancient memory for what I learned at uni 20 years ago, seached the net....

I need a query...

Given the table JOBS.

ID JOB LinkedUsers
20 70 1
21 71 1
22 71 2
23 72 1
24 72 2
25 73 1
26 74 1
27 75 1
28 75 2

I need to return "jobs" that that only have a user of "1" and not a user of "1" and "2"

so the output would be

70
73
74

Thanks

Rob