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Lovekesh Kumar

Loki's Mentor

Primary key in DBMS

Within a given relation, a set of one or more attributes having values that are unique within the relation and thus can uniquely identify that tuple, is said to be the primary key of the relation.

1 min read

Introduction to the InstaPy

InstaPy is a bot to automate Instagram Interactions like follow accounts, unfollow accounts, like posts, comments on posts.

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Deploy and host a static website with Netlify

Deploy modern static websites with Netlify. Get CDN, Continuous deployment, 1-click HTTPS, and all the services you need. You can deploy your website for free here.

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Primary Key

Within a given relation, a set of one or more attributes having values that are unique within the relation and thus can uniquely identify that tuple, is said to be the primary key of the relation. A Primary Key is a set of one or more attributes that can uniquely identify tuples within the relation. (adsbygoogle = window.adsbygoogle || []).push({}); Every relation does have a primary key. In our sample database, SuppNo is the primary key for Suppliers as it contains a unique value for each tuple in the relation. Similarly, ItemNo is the primary key for Items, and the combination

1 min read

Keys in DBMS

It is important to be able to specify how rows in a relation are distinguished conceptually, rows are distinct from one another, but from a database perspective, the difference among them must be expressed in terms of their attributes. Keys come here for a rescue. (adsbygoogle = window.adsbygoogle || []).push({}); 1. Primary KeyWithin a given relation, a set of one or more attributes having values that are unique within the relation and thus can uniquely identify that tuple, is said to be the primary key of the relation. A Primary Key is a set of one or more attributes that can

2 min read