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This video explains what happens under the hood when indexing a database and explains why it can lead to performance benefits.

Confused about ERD Shapes? Check out this guide for a comprehensive look at all ER diagram symbols and notation.

A Practical Introduction to Databases, an open educational resource textbook.

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Diagrams and explanations showing the difference between non-identifying (dashed line) and identifying (solid line) relationships in relational database design

I haven't been able to fully grasp the differences. Can you describe both concepts and use real world examples?

Start by learning the meaning of the relational database. A relational database is a type of database that stores and provides access to…

An Entity-Relationship Diagram (ERD) is a visual layout of the structure of a database. It shows the relationships between different…

Data modeling is a technique to document a software system using entity relationship diagrams (ER Diagram) which is a representation of the data structures in a table for a company’s database. It is a very powerful expression of the company’s business requirements. Data models are used for many purposes, from high-level conceptual models, logical to …

IIBA® endorsed course. Learn how to apply analysis skills on data projects and prepare for an IIBA®-CBDA certification

Prepare yourself for the PMI PBA certification exam to be certified as a Profesional in Business Analysis.

Competencies and Proficiency Levels per Knowledge Area Definitions of skill and knowledge levels used. Practical Knowledge or General Awareness: Limited practical experience. Expertise is developed in a safe, structured environment (small, less complex efforts) where guidance is both sought and provided. Basic Knowledge: Has a fundamental awareness of basic skills and knowledge involved in the work. Understands: Recognizes the key elements of the work and why they are important. However, not expected to have the experience nor skill to execute. Follows Rules: Adheres to prescribed ways to complete the work but needs rules and guidelines to successfully execute. The competency elements are grouped into six Knowledge Areas: Five of the knowledge areas are practitioner-based domains as discussed in IIBA’s Introduction to Business Data Analytics: A Practitioners View; and one is an organizational-based domain from IIBA’s Introduction to Business Data Analytics: An Organizational View.

Orange Data Mining Toolbox

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I have a problem with second normal form (2NF) and I have been unable to solve it by using Google. It is making me crazy because I am a teacher and I don't want to teach wrong stuff to my students....

In relational databases, especially large ones, you need to arrange entries so that other maintainers and administrators can read them and work on them. This is why database normalization is important. In simple words, database normalization entails organizing a database into several tables in order to reduce redundancy. You can

History of AI: Pigro's journey through the history of AI continues with the 1960s and 1970s featuring expert systems and machine learning.

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