Introduction to SQL

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Introduction to SQL

Introduction to SQL

1. Getting Started

What is SQL?Setting Up SQL and SSMS Getting Familiar with SSMS Structure of an SQL Database System The SELECT Statement Challenge: First Day as a Librarian Challenge: Find all Book Titles Challenge: Find Book Titles and Authors The DISTINCT Keyword Challenge: Find all Genres

2. Filtering Data

The WHERE Clause Challenge: Help a Reader Find Their Favorite Genre Challenge: Fetching Older Books Conditional Expressions: Comparison Operators Challenge: Avoid the Damaged Books Challenge: Highlight New Arrivals Challenge: Budget-Friendly Books Conditional Expressions: The AND Operator Challenge: Find Specific Books for a Reader Challenge: Defining Ranges Challenge: Multiple Conditions Conditional Expressions: The OR Operator Challenge: Matching Multiple Options Challenge: Excluding A Range Conditional Expressions: The NOT Operator Challenge: Negating a Range

3. Sorting Data

Basic Sorting Challenge: Sorting the Library Catalogue Sorting by Multiple Columns Challenge: Further Sorting the Catalogue Sorting after Filtering Data Challenge: Find the Cheapest Books Challenge: Help a Customer Find a Book The LIMIT Keyword Challenge: Select Books for the Collector's Section Challenge: Affordable Books

4. Populating a Database

Creating a Table Challenge: Creating a new Books Table Inserting Rows into a Table Challenge: Inserting Data Challenge: Inserting More Data Inserting Multiple Rows Challenge: Inserting Bulk Data Primary Keys The SERIAL Keyword Challenge: Changing the Books Structure Specifying Default Values Challenge: Further Improving the Books Table

5. Updating & Deleting Data

Updating Rows in a Table Challenge: Correct Book's Data Challenge: Updating Page Counts Challenge: Mark Archived Books As Unavailable Deleting Rows Challenge: Deleting Outdated Records Duplicating Tables Challenge: Create a Table Backup Challenge: Generate a Summarized Books Table Deleting Tables

What is SQL?

The SQL commands are categorized into smaller groups, namely:

Data Definition Language (DDL): commands that define the structure of the database. For example, commands for creating or deleting tables;
Data Query Language (DQL): commands that query, or in simpler terms, retrieve data from one or more tables;
Data Manipulation Language (DML): commands that manipulate data within the existing tables. For example, commands for inserting, updating, or deleting rows.

Many everyday applications use Relational Databases to store data.

There are various implementations of SQL, which are mostly similar with some differences and additional features. This course will cover commands and syntax common to all popular SQL versions.

You will use SQL Server Management Studio (SSMS) for learning and practicing SQL. The next chapter will guide you through setting up SQL and SSMS on your machine.

1. What does SQL stand for?

2. What is the primary purpose of Data Definition Language (DDL) commands?

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