CTE (Common Table Expression) in SQL

CTE (Common Table Expression) is a feature in SQL that allows you to define a temporary result set that can be used within a SELECT, INSERT, UPDATE, or DELETE statement. A CTE is similar to a derived table or subquery, but has some advantages over those techniques, including improved readability, reusability, and optimization opportunities. Continue reading CTE (Common Table Expression) in SQL

SQL Window Functions

SQL Window Functions are a feature of SQL that allow you to perform calculations across rows within a set of rows, called a “window”. The window is defined using the “OVER” clause and can be used to perform operations such as ranking, cumulative sums, running totals, and more. These functions provide a more concise and efficient way to perform calculations that would otherwise require complex subqueries or self-joins.

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OpenLDAP: Definition and Summary

OpenLDAP is an open-source implementation of the Lightweight Directory Access Protocol (LDAP), a network protocol used to access and manage directory information services. It provides a centralized repository for user authentication, authorization, and other information, making it an essential component in many enterprise IT systems. OpenLDAP supports various directory storage backends and is widely used for managing user identities and access control in large organizations.

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Logic behind 2FA

Two-factor authentication (2FA) codes provide an extra layer of security for login systems by requiring the user to present two different forms of identification. The first factor is usually a password, and the second factor is generated by an application, such as Google Authenticator, or sent to the user’s phone as a text message. The 2FA code acts as a one-time password that is only valid for a short period of time and is required in addition to the password in order to log in. This helps ensure that even if someone has obtained the user’s password, they still cannot access the account without the 2FA code, adding an extra barrier to prevent unauthorized access.

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What is Gitflow?

Gitflow is a branching model for Git, a version control system used for software development. It’s a way of organizing and managing branches in a Git repository. The main idea of Gitflow is to separate the different stages of development and keep the main branch, usually “master”(or “main”), always in a releasable state.

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