Computer Science · Database Management Systems
एक रिलेशनल डेटाबेस में निम्नलिखित तीन संबंधों पर विचार करें: Employee(eId, Name), Brand(bId, bName), Own(eId, bId) निम्नलिखित में से कौन सा रिलेशनल अलजेंब्रा एक्सप्रेशन उन eIds का सेट देता है जो सभी ब्रांडों के मालिक हैं?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1ΠeId((ΠeId(Own) × ΠbId(Own)) / ΠbId(Brand))
- 2ΠeId(ΠeId, bId(Own) / ΠbId(Own))
- 3ΠeId(Own) - ΠeId((ΠeId(Own) × ΠbId(Brand)) - ΠeId, bId(Own))✓
- 4ΠeId(ΠeId, bId(Own) / ΠbId(Brand))
सही उत्तर देखें
ΠeId(Own) - ΠeId((ΠeId(Own) × ΠbId(Brand)) - ΠeId, bId(Own))
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