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1 cze 2021 · 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.
1 cze 2021 · 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.
1 maj 2023 · Here is my list of some of the best books to learn SQL, which is absolutely free. You can either download their PDF version for offline reading, or you can read them online. 1. SQL Indexing and...
You can convert your SQL documents from any platform (Windows, Linux, macOS). No registration needed. Just drag and drop your SQL file on upload form, choose the desired output format and click convert button. Once conversion completed you can download your PDF file. You even can perform more advanced conversions.
5 wrz 2023 · Table of Contents. Chapter 1: Introduction. Chapter 2: SQL Tables. Chapter 3: Constraints. Chapter 4: CRUD Operations. Chapter 5: Basic SQL Queries. Chapter 6: How to Structure Return Data in SQL. Chapter 7: How to Perform Aggregations in SQL. Chapter 8: SQL Subqueries. Chapter 9: Database Normalization. Chapter 10: How to Join Tables in SQL.
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.
Free SQL Basics Resource! SQL notes covering syntax, SELECT, INSERT, UPDATE, DELETE, and more. Perfect for beginners and professionals.
