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1. www.w3schools.com › sqlSQL Tutorial - W3Schools

   www.w3schools.com › sql

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   SQL is a standard language for storing, manipulating and retrieving data in databases. Our SQL tutorial will teach you how to use SQL in: MySQL, SQL Server, MS Access, Oracle, Sybase, Informix, Postgres, and other database systems. Start learning SQL now » Examples in Each Chapter.

2. riptutorial.com › ebook › sql-serverLearning Microsoft SQL Server eBook (PDF) - riptutorial.com

   riptutorial.com › ebook › sql-server

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   Learning Microsoft SQL Server eBook (PDF) Download this eBook for free. Chapters. Chapter 1: Getting started with Microsoft SQL Server. Chapter 2: Advanced options. Chapter 3: Aggregate Functions. Chapter 4: Alias Names in Sql Server. Chapter 5: Analyzing a Query. Chapter 6: Backup and Restore Database.

3. drive.google.com › file › d01 - SQL - Oracle SQL Training Manual.pdf - Google Drive

   drive.google.com › file › d

   Download. 01 - SQL - Oracle SQL Training Manual.pdf. 01 - SQL - Oracle SQL Training Manual.pdf.

4. riptutorial.com › ebook › sqlLearning SQL eBook (PDF) - riptutorial.com

   riptutorial.com › ebook › sql

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   Learning SQL eBook (PDF) Download this eBook for free. Chapters. Chapter 1: Getting started with SQL. Chapter 2: ALTER TABLE. Chapter 3: AND & OR Operators. Chapter 4: Cascading Delete. Chapter 5: CASE. Chapter 6: Clean Code in SQL.

5. 365datascience.com › resources-center › course-notesSQL Notes: Basics (Downloadable PDF) – 365 Data Science

   365datascience.com › resources-center › course-notes

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   Our SQL Basics Resource offers a comprehensive overview of essential SQL concepts and commands—crucial for anyone looking to master database management and manipulation. Download our free SQL PDF and get started with SQL notes to help you understand the core of this essential query language.

6. learnsql.com › standard-sql-functions-cheat-sheet-mobileMobile-friendly Standard SQL Functions Cheat Sheet - LearnSQL.com

   learnsql.com › standard-sql-functions-cheat-sheet-mobile

   USEFUL FUNCTIONS. Get the count of characters in a string: SELECT LENGTH('LearnSQL.com'); -- result: 12. Convert all letters to lowercase: SELECT LOWER('LEARNSQL.COM'); -- result: learnsql.com. Convert all letters to uppercase: SELECT UPPER('LearnSQL.com'); -- result: LEARNSQL.COM.

7. docs.oracle.com › oracle-database › 19SQL Language Quick Reference - Oracle

   docs.oracle.com › oracle-database › 19

   SQL statements are the means by which programs and users access data in an Oracle database. The sections that follow show each SQL statement and its related syntax.