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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.
- SQL
Many SQL databases are implemented as client/server systems;...
- Cascading Delete
Cascading Delete - Learning SQL eBook (PDF) -...
- CREATE Database
CREATE Database - Learning SQL eBook (PDF) - riptutorial.com
- Stored Procedures
Stored Procedures are SQL statements stored in the database...
- DROP or DELETE Database
DROP or DELETE Database - Learning SQL eBook (PDF) -...
- In Clause
In Clause - Learning SQL eBook (PDF) - riptutorial.com
- Triggers
Triggers - Learning SQL eBook (PDF) - riptutorial.com
- CASE
Learn SQL - The CASE expression is used to implement if-then...
- SQL
SQL for beginners. Introduction. SQL is a language to query data. In most cases it is used to retrieve data from databases. Because SQL is so convenient, it may be used to query data that lives outside of databases (for example, you can use it with plain files). In day-to-day work of Data Engineers it plays a very important role.
Chapter 1: Setting Up Your Coding Environment. Chapter 2: Creating Your First Database and Table. Chapter 3: Beginning Data Exploration with SELECT. Chapter 4: Understanding Data Types.
Chapter 2, Creating and Populating a Database, demonstrates how to create a MySQL database, create the tables used for the examples in this book, and populate the tables with data.
1 cze 2021 · Standard SQL Functions Cheat Sheet. TEXT FUNCTIONS. CONCATENATION. Use the || operator to concatenate two strings: SELECT 'Hi ' || 'there!'; -- result: Hi there! Remember that you can concatenate only character strings using ||. Use this trick for numbers: SELECT '' || 4 || 2; -- result: 42.
use either SQL*Plus or iSQL*Plus to execute your SQL statements, or perhaps you chose another front-end query tool that also allows you to enter SQL commands. (The companion Web site to this book lists other alternative query tools.)
Chapter 2, Creating and Populating a Database, demonstrates how to create a MySQL database, create the tables used for the examples in this book, and populate the tables with data.
