ERD Video Series

ByWalter Wimberly

Entity Relationship Diagrams (ERDs) are visual design tools for databases, crucial before table creation. This series teaches using Lucid Chart, an accessible browser-based tool with exportable SQL code capabilities. Instructions range from setting up workspaces and creating abstract entities to defining one-to-many and many-to-many relationships. It also covers adding field details like key types and data types. The series culminates with exporting ERD as SQL commands, demonstrating Lucid Chart’s efficiency in converting diagrams into databases.

MS Access Video Playlist

ByWalter Wimberly

Explore the essentials of MS Access as a relational database through a video playlist designed to teach building and managing tables, relationships, and queries. Start with the basics of database design, learn to edit existing tables, understand various data types, and handle data updates efficiently. Discover the use of MS Access Relationship Window, master query creation to retrieve and organize data, and import or export it seamlessly. Perfect for both beginners and those enhancing their database skills, the guide covers every aspect to achieve proficiency in Microsoft Access.

Java Sets

ByWalter Wimberly

Java has two different types of sets, Unsorted and Sorted… even if Math Sets are technically unsorted. Unsorted Sets Unsorted sets in Java are not a class that can be defined. Therefore you need to use the HashSet and then use the polymorphic nature of the OOP to create the set. From here, you want…

Calculating a Password’s Strength

ByWalter Wimberly

Password entropy predicts how difficult a given password would be to crack through guessing, brute force cracking, dictionary attacks or other common methods. Entropy essentially measures how many guesses an attacker will need to make to guess your password. As computing power increases, the amount of time required to guess passwords decreases, in many cases significantly especially…