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15 PostgreSQL commands

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There are many PostgreSQL manuals on the network that describe the basic commands. But as you dive deeper into the work, you’ll encounter practic…

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MongoDB: Database sample

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    The easiest way to get the database content is to use the find function. The action of this function is largely similar to the usual SELECT * FRO…

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    What is MongoDB? Introduction to MongoDB

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      MongoDB implements a new approach to database construction, where there are no tables, schemes, SQL queries, external keys, and many other things…

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      PostgreSQL NOT condition

      The PostgreSQL NOT condition (also called the NOT operator) is used to deny the condition in SELECT, INSERT, UPDATE or DELETE….

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      How to install MySQL on Ubuntu 20.04

      MySQL is the most popular open-source relational database management system. It is fast, easy to use, scalable, and an integral part of the popular LA…

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