the DBA's at my company are f'n smart. we have both Oracle DBA's and SQL DBA's. I know these guys have to be making at least 80k. Knowing SQL is definately a good thing to know if you think you want to go that way...but you REALLY need to know it. you can kind of relate it to programming with the SQL statements that you need to write. When i had a SQL/Oracle class in college, i thought it was really fun. but that was the only class they offered, so i didnt try to pursue that.
network admin is really broad...guess it depends on the size of company you work for. like where i am (800 employees), we dotn have anybody with that title. we have network engineers, system engineers, desktop support, and helpdesk. we are all specialized in certain things. usually when you're at smaller companys, with smaller IT departments, you have network admin. network admin usually needs to know everything from routing and switching to building and maintaining servers
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