I'd say in the companies I've worked in, a person with database skills is more highly sought after and coveted. I'd think someone who can plan a database and can code is more valuable than a coder. I also see them as a step or two closer to "architect" which is even better. I believe either a developer or a DB guy can learn each others parts so in the end it likely doesn't matter. You'll end up learning both as you're interested in both. If you think it would be harder to learn one or the other on your own then study the harder one.
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