2025-08-05T18:40:45+05:30 Techtutor Administrator https://techtutor.io https://techtutor.io/ninja/sql-tutorial/what_is_Datawarehouse_data_lake_data_mart_sql 2025-08-05T18:40:45+05:30

In a modern data architecture, these three components often work together:,a Data Lake serves as the initial landing zone for all raw data, a Data Warehouse holds the processed and trusted enterprise-wide data for BI, and multiple Data Marts provide focused, high-performance data for individual departments.

https://techtutor.io/ninja/sql-tutorial/denormaliztion 2025-08-01T17:15:45+05:30

An index is a special lookup table that the database search engine uses to speed up data retrieval operations. Think of it like the index at the back of a book, instead of reading every page to find a specific topic, you go to the index, find the topic, and it points you directly to the relevant page numbers.

https://techtutor.io/ninja/sql-tutorial/Normalisation-and-denormalization-in-sql 2025-07-31T19:45:45+05:30

This article introduces Normalization as a core principle in SQL database design, focusing on efficient data organization, redundancy reduction, and data integrity improvement. It likens normalization to effective digital file management, where a single master copy of data is maintained to avoid duplication.

https://techtutor.io/ninja/sql-tutorial/set_operators 2025-07-29T16:30:40+05:30

Set operators are used for data cleaning, analysis results from two difference tables, different tables present in different schemas. These operators are very useful for data comparing and analytical purpose.

https://techtutor.io/ninja/sql-tutorial/OLAP_vs_OLTP 2025-07-24T16:45:45+05:30

In the vast landscape of data management and analytics, two fundamental approaches stand out Online Transaction Processing (OLTP) and Online Analytical Processing (OLAP). While both deal with data, their core objectives, underlying architectures, and operational characteristics are strikingly different, yet often complementary. Understanding this distinction is crucial for any organization aiming to effectively manage its data, optimize its operations, and derive meaningful insights for strategic decision making.

https://techtutor.io/ninja/sql-tutorial/indexing-in-sql 2025-07-18T15:34:45+05:30

An index is a special lookup table that the database search engine uses to speed up data retrieval operations. Think of it like the index at the back of a book instead of reading every page to find a specific topic, you go to the index, find the topic, and it points you directly to the relevant page numbers.

https://techtutor.io/ninja/sql-tutorial/how-to-extract-domain-from-email 2025-07-15T16:45:45+05:30

In this article you will learn Scenario based SQL interview questions trending in 2025 so one of the trending question in how to extract domain name from an email with example of various Databases.

https://techtutor.io/ninja/sql-tutorial/views-vs-materialized-views 2025-07-10T18:10:40+05:30

Views and materialized views are both database objects that represent the result of a query, but they differ significantly in how they store and manage data. A view provides a dynamic, real-time look at your data without storing it, while a materialized view provides a static, pre-computed snapshot of your data for faster retrieval at the cost of potential staleness and increased storage/maintenance.

https://techtutor.io/ninja/sql-tutorial/Understanding_Databases_From_Foundational_Concepts_to_Basic_SQL_Commands 2025-07-01T21:40:45+05:30

Database emerged where large collection of data can be store in tabular format making the data organized and easy accessibility of data within the computer electronically. Here referred data can be image, text, numeric values

https://techtutor.io/ninja/sql-tutorial/basic-unix-commands-cheatsheet 2025-07-01T21:40:40+05:30

The article we will learn some most basic Unix commands, If you are a fresher or new to Unix this article will help you learn and understand the most basic Unix commands which any one can learn in few minutes. Also, these are frequently asked questions in interview.

https://techtutor.io/ninja/sql-tutorial/sql-windows-function 2025-07-01T21:40:40+05:30

The article we will learn about sql windows function like RANK, DENSE_RANK, ROW_NUMBER which ahs wide implementation, widely used for assigning ranks or numbers to rows within a result set, but they handle ties (duplicate values in the ordering column) differently.

https://techtutor.io/ninja/sql-tutorial/database-practice-uses-day-to-day-life 2025-06-15T17:35:35+05:30

Database has huge applications in today’s life. As we are becoming more digital we are generating humongous digital data like photos, videos, text-based files, electronic books, and e-newspapers , healthcare data, transactional data, insurance data etc which is now a part of our day-to-day activity. We need to store those data electronically in computer systems with the hep of databases or DBMS so that data can be managed in a readable format, also can be retrieve when required for our future references.

https://techtutor.io/articles/article/why-you-should-learn-python-in-2025 2025-06-10T22:29:35+05:30

Thinking about learning Python in 2025? Discover the top reasons, including its booming job market, versatility in AI, data science, web development, and why it's still the best programming language for beginners. Future-proof your career today!