--- title: "#databaseconcepts articles | Hashnode" description: "Explore 3 articles tagged #databaseconcepts on Hashnode. Tutorials, guides, and how-tos from the community." url: "https://hashnode.com/tag/databaseconcepts" --- Tag # #databaseconcepts 3 posts · 0 followers [Mauricio Muñoz Palma](https://hashnode.com/@LaboticadelDBA) · [Jan 19, 2025](https://hashnode.com/posts/introduccion-a-oracle-database/678d7adfcda69cee3237b121) ### [Introducción a Oracle Database](https://laboticadeldba.com/introduccion-a-oracle-database?utm_source=hashnode&utm_medium=feed) Explora los fundamentos y arquitectura de Oracle Database, un líder en gestión de bases de datos relacionales para entornos empresariales 5 min read · [laboticadeldba.com](https://laboticadeldba.com/introduccion-a-oracle-database?utm_source=hashnode&utm_medium=feed) [Abdelrahman Mohamed Elsheikh](https://hashnode.com/@abdelrahman-mohamed) · [Mar 7, 2024](https://hashnode.com/posts/transaction-4-read-phenomena-and-isolation-levels/65ea4391dcf3ee2159936a26) ### [Transaction 4 Read Phenomena and Isolation Levels](https://abd-elrahman.hashnode.dev/transaction-4-read-phenomena-and-isolation-levels?utm_source=hashnode&utm_medium=feed) Transactions A Transaction is a sequence of one or more SQL statements executed as a single unit of work. A transaction represents a logical unit of work that is either fully completed or fully rolled back to its previous state if any part of it fail... 4 min read · [abd-elrahman.hashnode.dev](https://abd-elrahman.hashnode.dev/transaction-4-read-phenomena-and-isolation-levels?utm_source=hashnode&utm_medium=feed) [Abdelrahman Mohamed Elsheikh](https://hashnode.com/@abdelrahman-mohamed) · [Mar 7, 2024](https://hashnode.com/posts/mysql-shell-commands/65ea488318254fa3203312de) ### [MySQL Shell Commands](https://abd-elrahman.hashnode.dev/mysql-shell-commands?utm_source=hashnode&utm_medium=feed) Entering the SQL mode \\sql connecting with a certain user \\connect root@localhost using a specific database use new\_db; creating a new user and adding a password for him. create user ali@localhost identified by '123pass' DCL (Data Control Languag... 1 min read · [abd-elrahman.hashnode.dev](https://abd-elrahman.hashnode.dev/mysql-shell-commands?utm_source=hashnode&utm_medium=feed)