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PostgreSQL Constraints

PostgreSQL Constraints: You’ll learn how to create, add, and remove unique constraints in PostgreSQL with syntax and examples….

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PostgreSQL LIKE condition

PostgreSQL LIKE condition allows using wildcards (metacharacters) in WHERE proposal of SELECT, INSERT, UPDATE or DELETE operator. This allows for patt…

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How to install MongoDB in Ubuntu 20.04

MongoDB is a free open source database of documents. It belongs to a family of databases called NoSQL, which is different from traditional table-based…

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PostgreSQL change user password

The ALTER USER operator is used to change the user password in a PostgreSQL database….

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PostgreSQL Join

PostgreSQL JOIN is used to extract data from multiple tables. PostgreSQL JOIN is executed whenever two or more tables are combined in an SQL statement…

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