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How to use a MySQL database in Java

​​In this article, we will learn how to connect to a MySQL database from Java code and execute simple queries to retrieve and update data. In order…

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How to compare NULL values with other significant values

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In this article, you will learn how to display NULL values in other meaningful values.

Dr.EFCodd, who is the creator of the relational model for…

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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: count, group, distinct

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    MongoDB grouping commands: count, group, distinct should be considered separately….

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    MongoDB Database; Adding data

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      MongoDB Database – Having installed the DB, we can now add data to it. All data is stored in the DB in the BSON format, which is close to JSON, s…

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