Introduction to PL/SQL
PL/SQL (Procedural Language/Structured Query Language) is a powerful procedural extension to SQL developed by Oracle Corporation. It is used to write complex database applications, automate tasks, and enhance the capabilities…
Oracle Cheat Sheet
Oracle Database is a comprehensive and robust relational database management system (RDBMS) widely used for enterprise-level applications. This cheat sheet presents essential commands and queries to interact efficiently with Oracle…
PostgreSQL Cheat Sheet
PostgreSQL is a powerful open-source relational database management system (RDBMS) known for its extensibility and advanced features. This cheat sheet presents key commands and queries to interact effectively with PostgreSQL…
MySQL Cheat Sheet
MySQL is a popular relational database management system (RDBMS) known for its performance and flexibility. This cheat sheet provides essential commands and queries for interacting with MySQL databases efficiently. Connecting…
How to use Oracle’s decode() function
The DECODE function in Oracle, available from version 9i and above, serves as a powerful and concise alternative to using IF-THEN-ELSE statements. It provides a way to conditionally transform or…
When to use DynamoDB and when not to
DynamoDB is a fully managed NoSQL database service provided by Amazon Web Services (AWS). It is designed to deliver high-performance, scalable, and reliable database solutions for applications that require low-latency…
Amazon RDS vs Amazon Aurora
Amazon RDS (Relational Database Service) and Amazon Aurora are both managed database services provided by Amazon Web Services (AWS) that allow you to run a relational database in the cloud…
Relational vs NoSQL databases
Relational databases and NoSQL databases are two different types of databases that serve different purposes and have different strengths and weaknesses. Relational databases are based on the relational data model…
An Introduction to Structured Data Storage
The world of data storage has come a long way since the days of paper records and filing cabinets. With the advent of the internet and digital technology, storing and…
How to empty a MySQL database
Emptying a databases involves dropping (deleting) all its tables. The easiest way to do this is to drop and recreate a database: Depending on the system you are working, the…