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Category87

Transaction Transaction "transaction" refers to a concept representing a series of database operations. Transactions ensure the properties of atomicity, consistency, isolation, and durability (ACID) in the database, which are essential for managing data reliably and securely. Explanation of each ACID property: 1. Atomicity: All operations within a transaction must be treated as an indivisible unit, meaning .. 2024. 4. 22.
Normalization & Denormalization Normalization Normalization in data analysis refers to the process of organizing a database efficiently to reduce redundancy and improve data integrity and efficiency. The three stages of normalization—first normal form (1NF), second normal form (2NF), and third normal form (3NF)—each address specific types of data redundancy and dependencies. 1. First Normal Form (1NF): Ensures that each column.. 2024. 4. 22.
Join And function there was an issue in the process of solving the SQL questions due to problems with date setting. Table: Prices +---------------+---------+ | Column Name | Type | +---------------+---------+ | product_id | int | | start_date | date | | end_date | date | | price | int | +---------------+---------+ (product_id, start_date, end_date) is the primary key (combination of columns with unique values) fo.. 2024. 4. 19.
Waterfall Model & Agile Model Waterfall Model: Characteristics: The waterfall model follows a sequential and linear approach. Each phase must be completed before the next one begins. Key phases include requirements definition, design, implementation, testing, and maintenance. Advantages: Each phase is clearly defined, making it easy to track the progress of the project. It's easy to assess the impact of requirement or design.. 2024. 4. 17.
Importance of data modeling Ripple Effect: Data modeling plays a crucial role in minimizing the ripple effect of changes on the database. A well-designed data model reduces the impact of modifications to data structures on other parts of the system. For example, if changes are made to the attributes of one entity in the data model without affecting other entities, it reduces the effort required for system maintenance and u.. 2024. 4. 17.
How to add localhost at DBeaver (MY SQL) An error occurred during the process of converting text to numbers in DBeaver. When importing a CSV file into DBeaver, it failed to recognize text as numbers, resulting in this error. T o resolve this, MySQL Community was installed and localhost was configured. Now, I will explain how to set up localhost after installing MySQL Community. This is my first screen and I will create 'locahost_v2' Yo.. 2024. 4. 16.

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