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Indexing Beyond the Basics

Автор: Limpopo5 от 2023-12-04, 21:38:44
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Indexing Beyond the BasicsНазвание: Indexing Beyond the Basics
Автор: Тоbiаs Реtrу
Издательство: Independently published
Год: 2023
Язык: английский
Формат: pdf (true), epub
Размер: 20.7 MB

Learn to create indexes for your slow queries by following simple principles. Hi! I'm Tobias Petry, a full stack developer who used to suck at writing fast database queries. Whenever I had a slow query, I needed to ask more advanced developers for help and hope they had time for me. Like everyone, I always wished I could solve those problems on my own. But even after reading some tutorials I didn't get any closer to my goal. The number of queries I couldn't optimize by far exceeded the ones I could make faster. So I learned everything about databases over the next 10+ years from countless books, conferences, trainings, articles and much practice. Finally, I could fix any slow query entirely without help. But during my consulting work I found that most developers still face the same problem. The reason database indexes are still not understood by developers is the depth of the existing content. Whether it is books, articles or videos - they all have their own problems that limit the ability to understand database indexing. You are a developer who can write SQL queries but struggle with creating the correct indexes to make them fast. Neither do you have the time or interest to learn this topic in weeks - a couple evenings on the couch should be enough. You also just want to learn the practical knowledge necessary to complete your task and move on to other things. The content should avoid any technical complex database implementation details - you want the core information quickly, concisely and understandably.

Access 365 Project Book: Hands-On Database Creation

Автор: Limpopo5 от 2023-11-24, 15:10:36
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Access 365 Project Book: Hands-On Database CreationНазвание: Access 365 Project Book : Hands-On Database Creation
Автор: Julittа Коrоl
Издательство: Mercury Learning and Information
Год: 2024
Страниц: 469
Язык: английский
Формат: pdf (true)
Размер: 33.9 MB

This is a project book that guides you through the process of building a traditional Access desktop database that uses one Access database as the front-end (queries, reports, and forms) and another Access database to contain the tables and data. By separating the data from the rest of the database, the Access database can be easily shared by multiple users over a network. When you build a database correctly at the outset, later this database can be migrated to another system with fewer issues and fewer objects that need to be redone. Microsoft Access has been the top database management solution for individuals and businesses for over two decades. Many of today’s database systems started as small Access databases or were ported from Microsoft Excel spreadsheets. With Microsoft’s commitment to continuing the development of the product, Access keeps getting better with each new update. Across all types and sizes of organizations, people continue to utilize Access to collect, track, and analyze data from multiple sources and build useful forms and reports. Non-devel-opers are creating various Access databases because with Access they can quickly move forward and get their job done without requiring much support from the IT (Information Technology) department. Access 365 Project Book: Hands-On Database Creation is a hands-on database project that guides you through the process of building a traditional Access desktop database that is later split into two files: a back-end database that contains tables with data, and a front-end database that contains forms, reports, queries, macros, and code modules.

Querying Databricks with Spark SQL: Leverage SQL to query and analyze Big Data for insights

Автор: Limpopo5 от 2023-11-14, 13:55:18
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Querying Databricks with Spark SQL: Leverage SQL to query and analyze Big Data for insightsНазвание: Querying Databricks with Spark SQL: Leverage SQL to query and analyze Big Data for insights
Автор: Аdаm Аsрin
Издательство: BPB Publications
Год: 2024
Страниц: 638
Язык: английский
Формат: epub (true)
Размер: 37.4 MB

A practical guide to using Spark SQL to perform complex queries on your Databricks data. Databricks stands out as a widely embraced platform dedicated to the creation of data lakes. Within its framework, it extends support to a specialized version of Structured Query Language (SQL) known as Spark SQL. If you are interested in learning more about how to use Spark SQL to analyze data in a data lake, then this book is for you. The book covers everything from basic queries to complex data-processing tasks. It begins with an introduction to SQL and Spark. It then covers the basics of SQL, including data types, operators, and clauses. The next few chapters focus on filtering, aggregation, and calculation. Additionally, it covers dates and times, formatting output, and using logic in your queries. It also covers joining tables, subqueries, derived tables, and common table expressions. Additionally, it discusses correlated subqueries, joining and filtering datasets, using SQL in calculations, segmenting and classifying data, rolling analysis, and analyzing data over time. The book concludes with a chapter on advanced data presentation. Data is the lifeblood of the enterprise. Whether “Big Data” or the data stored in classic databases, it is queried using a variant of Structured Query Language (SQL). So, simply put, SQL is key to data analysis.

Data Science: The Hard Parts: Techniques for Excelling at Data Science

Автор: Limpopo5 от 2023-11-11, 20:11:53
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Data Science: The Hard Parts: Techniques for Excelling at Data ScienceНазвание: Data Science: The Hard Parts: Techniques for Excelling at Data Science
Автор: Dаniеl Vаughаn
Издательство: O’Reilly Media, Inc.
Год: 2024
Страниц: 257
Язык: английский
Формат: True PDF, True EPUB
Размер: 10.1 MB, 10.2 MB

This practical guide provides a collection of techniques and best practices that are generally overlooked in most data engineering and Data Science pedagogy. A common misconception is that great data scientists are experts in the "big themes" of the discipline—Machine Learning and programming. But most of the time, these tools can only take us so far. In practice, the smaller tools and skills really separate a great data scientist from a not-so-great one. I’ll posit that learning and practicing data science is hard. It is hard because you are expected to be a great programmer who not only knows the intricacies of data structures and their computational complexity but is also well versed in Python and SQL. Statistics and the latest machine learning predictive techniques ought to be a second language to you, and naturally you need to be able to apply all of these to solve actual business problems that may arise. But the job is also hard because you have to be a great communicator who tells compelling stories to nontechnical stakeholders who may not be used to making decisions in a data-driven way.

SQL Antipatterns, Volume 1: Avoiding the Pitfalls of Database Programming

Автор: Limpopo5 от 2023-11-11, 14:03:36
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SQL Antipatterns, Volume 1: Avoiding the Pitfalls of Database ProgrammingНазвание: SQL Antipatterns, Volume 1: Avoiding the Pitfalls of Database Programming
Автор: Вill Каrwin
Издательство: Pragmatic Bookshelf
Год: November 2022 (Version: P1.0)
Страниц: 379
Язык: английский
Формат: pdf (true), epub, mobi
Размер: 10.2 MB, 10.2 MB

SQL is the ubiquitous language for software developers working with structured data. Most developers who rely on SQL are experts in their favorite language (such as Java, Python, or Go), but they're not experts in SQL. They often depend on antipatterns - solutions that look right but become increasingly painful to work with as you uncover their hidden costs. Learn to identify and avoid many of these common blunders. Refactor an inherited nightmare into a data model that really works. Updated for the current versions of MySQL and Python, this new edition adds a dozen brand new mini-antipatterns for quick wins. No matter which platform, framework, or language you use, the database is the foundation of your application, and the SQL database language is the standard for working with it. Antipatterns are solutions that look simple at the surface, but soon mire you down with needless work. Learn to identify these traps, and craft better solutions for the often-asked questions in this book. Avoid the mistakes that lead to poor performance and quality, and master the principles that make SQL a powerful and flexible tool for handling data and logic.

CompTIA DataSys+ Study Guide: Exam DS0-001

Автор: Limpopo5 от 2023-10-16, 19:39:40
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CompTIA DataSys+ Study Guide: Exam DS0-001Название: CompTIA DataSys+ Study Guide: Exam DS0-001
Автор: Мikе Сhaррlе, Shаrif Nijim
Издательство: Sybex
Год: 2024
Страниц: 459
Язык: английский
Формат: pdf, epub
Размер: 55.3 MB

Your all-in-one guide to preparing for the CompTIA DataSys+ exam. In CompTIA DataSys+ Study Guide: Exam DS0-001, a team of accomplished IT experts delivers a practical and hands-on roadmap to succeeding on the challenging DS0-001 exam and in a new or existing career as a data systems professional. In the book, you’ll explore the essentials of databases, their deployment, management, maintenance, security, and more. Whether you’re preparing for your first attempt at the CompTIA DataSys+ exam or for your first day on the job at a new database-related IT position, this book walks you through the foundational and intermediate skills you need to have to succeed. It covers every objective tested by the DS0-001 and skills commonly required in the real-world. Structured Query Language is the standard programming language for managing and manipulating data stored in relational databases. It is used by organizations of all sizes and in various industries to store, retrieve, and analyze data. SQL is essential for working with relational databases because it allows developers and database administrators to create data structures and manipulate data. Scripting is the process of automating a series of tasks. Relational databases support SQL, making it easy for developers, analysts, and administrators to use the same language to work with various relational databases, from PostgreSQL to Oracle.

Learning Snowflake SQL and Scripting: Generate, Retrieve, and Automate Snowflake Data

Автор: Limpopo5 от 2023-10-06, 10:17:39
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Learning Snowflake SQL and Scripting: Generate, Retrieve, and Automate Snowflake DataНазвание: Learning Snowflake SQL and Scripting: Generate, Retrieve, and Automate Snowflake Data
Автор: Аlаn Веаuliеu
Издательство: O’Reilly Media, Inc.
Год: 2024
Страниц: 762
Язык: английский
Формат: pdf, epub (true)
Размер: 11.2 MB

To help you on the path to becoming a Snowflake pro, this concise yet comprehensive guide reviews fundamentals and best practices for Snowflake's SQL and Scripting languages. Developers and data professionals will learn how to generate, modify, and query data in the Snowflake relational database management system as well as how to apply analytic functions for reporting. Author Alan Beaulieu also shows you how to create scripts, stored functions, and stored procedures to return data sets using Snowflake Scripting. This book is ideal whether you're new to databases and need to run queries or reports against a Snowflake database, or transitioning from databases such as Oracle, SQL Server, or MySQL to cloud-based platforms. What Is SQL Scripting? If you have programmed with a procedural language such as Java, C#, or Go, you are familiar with such programming constructs as looping, if-then-else, and exception handling. SQL, being a nonprocedural language, has none of these constructs. To bridge this gap, most database platforms provide both a nonprocedural SQL implementation along with a procedural language that includes both the SQL data statements such as select and insert along with all of the usual procedural programming constructs.

Fuzzy Data Matching with SQL: Enhancing Data Quality and Query Performance

Автор: Limpopo5 от 2023-10-06, 09:58:03
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Fuzzy Data Matching with SQL: Enhancing Data Quality and Query PerformanceНазвание: Fuzzy Data Matching with SQL: Enhancing Data Quality and Query Performance
Автор: Jim Lehmer
Издательство: O’Reilly Media, Inc.
Год: 2024
Страниц: 425
Язык: английский
Формат: pdf, epub (true), mobi
Размер: 10.1 MB

If you were handed two different but related sets of data, what tools would you use to find the matches? What if all you had was SQL SELECT access to a database? In this practical book, author Jim Lehmer provides best practices, techniques, and tricks to help you import, clean, match, score, and think about heterogeneous data using SQL. DBAs, programmers, business analysts, and data scientists will learn how to identify and remove duplicates, parse strings, extract data from XML and JSON, generate SQL using SQL, regularize data and prepare datasets, and apply data quality and ETL approaches for finding the similarities and differences between various expressions of the same data. Full of real-world techniques, the examples in the book contain working code.

Mastering SQL Joins: A Quick Handbook On Mastering SQL Joins With Practical Exercises

Автор: Limpopo5 от 2023-09-19, 19:44:28
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Mastering SQL Joins: A Quick Handbook On Mastering SQL Joins With Practical ExercisesНазвание: Mastering SQL Joins: A Quick Handbook On Mastering SQL Joins With Practical Exercises
Автор: Dane Wade
Издательство: DataCeps
Год: 2023
Язык: английский
Формат: pdf, epub
Размер: 11.5 MB

Are you overwhelmed by SQL Joins?? Do you struggle to understand the concept of different SQL Joins? If Yes, then keep reading... Understanding the concept of SQL Joins is indeed a challenging task for many people. Combining data from multiple datasets and creating advanced queries leads to frustration and confusion. All you need is a resource that simplifies SQL joins and provides ample opportunities for practice. "Mastering SQL Joins: A Quick Handbook On Mastering SQL Joins With Practical Exercises" is your ultimate solution. This short handbook has everything you want to know about SQL as well as the hands-on challenges that'll equip you with skills to succeed. This book is not another dense theory-packed boring textbook filled with only technical jargon and fluff, which you need a computer science degree to understand. This is not just a textbook; this is an interactive practical handbook!

Grokking the SQL Interview : Master SQL, Excel in Interviews, Elevate Your Career

Автор: Limpopo5 от 2023-09-11, 01:09:13
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Grokking the SQL Interview : Master SQL, Excel in Interviews, Elevate Your CareerНазвание: Grokking the SQL Interview : Master SQL, Excel in Interviews, Elevate Your Career
Автор: Javin Paul
Издательство: Leanpub
Год: August 2023
Страниц: 281
Язык: английский
Формат: pdf (true)
Размер: 12.5 MB

Ready to master SQL and ace your dream job interview? Dive into "Grokking the SQL Interview," your passport to SQL expertise! Uncover the secrets to crafting powerful queries, mastering joins, and acing real-world SQL interviews? Are you on the brink of a career in data analytics, database administration, or software development? Perhaps you're gearing up for a crucial job interview that hinges on your SQL skills. If so, "Grokking the SQL Interview" is your essential companion on the path to SQL mastery and interview success. As a Java developer who has cleared SQL interviews, I can attest that SQL interviews are not easy, given the vast nature of SQL and the variety of concepts and topics it covers. When I was preparing for Java interviews, I was looking for a resource where I learn and prepare SQL questions from a programmer’s perspective rather than a DBA, but I couldn’t find any. Grokking the SQL Interview is my effort to fill that gap and become an excellent resource for anyone looking to master SQL and prepare for SQL interviews. Whenever I prepare for Java Interview, I always prepare about SQL and Linux; these are everywhere. That’s why I decided to cover essential topics from an interview perspective when I thought to write about this book.

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