Day to day, I think the DBA's biggest challenge is juggling all of the tasks the DBA is required to perform. I typically have two or three long running processes going (Oracle exports/imports, table reorgs, index rebuilds and so on) at the same time I'm putting out a couple of fires, answering people's questions and adding in a couple of other DBA tasks like reading logs. The DBA needs to master the skill of multi-tasking. The DBA needs to be able to quickly prioritize those tasks that need to be done immediately (like fixing a downed production database) and those that can take a while, but need to be started soon to meet deadlines.
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