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Hi,
I'm new to SQL, and I'm hoping to get some help in selecting a value based on a hierachy.
What I'm trying to achieve is get the campus phone number, and if this is not available, then go down the hierarchy:
if campus phone is null then get business_phone
if business_phone is null then get permanent_phone
columns in the table are defined as follows:
emp_id, tele_code, tele_phone
1234 CA (campus) NULL
1234 PR(permanent) xxx-xxxx
1234 BU(business) xxx-xxxx
Thank you in advance for all the help.
salex
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