Virtual foreign keys are useful in databases where physical foreign key constraints are not present. They allow you to define and enforce relationships between tables virtually, ensuring data ...

The situation where some column is both primary and foreign key is often used to model one-to-at-most-one relationships. We have quite a lot of such relationships in exiting databases. I have not ...

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PDF for computer application from the official Punjab Board website. Access chapter-wise details for chemistry with the link ...

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Last year, Elon Musk was the Pied Piper of support for Donald J. Trump among Silicon Valley power brokers. One by one, tech billionaires close to Mr. Musk who had either backed Democrats or ...