Whats sql

whats sql SQL stands for Structured Query Language. It’s the language of choice on today’s web for storing, manipulating and retrieving data within relational databases. Most, if not all of the websites you visit will use it in some way. Using SQL, you are able to interact with the database by writing queries, which when […]

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What is sql

what is sql Structured Query Language A language which enables a user to create, modify and essentially interact with a database. Two of the most common Database Management Engines are MySQL: https://www.mysql.com/ PostgreSQL: https://www.postgresql.org/ what is sql SQL stands for: Structured Query Language It’s language which enables a user to create, modify and essentially interact […]

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What is self join in sql

what is self join in sql Self is joining a table to itself. — assume employee table as 2 different table using different alias — as manager and worker — we want to join these 2 virtual manager and worker table — to get manager’s first name and worker’s first name — our condition is […]

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