Introduction to Transact-SQL 5 day (See DP-080 Query and modify data with Transact-SQL)

The Basics

The material we cover in this module will be used throughout the course. Understanding objects and object names, the processing order of a query, literal values, identifiers and delimiters, SSMS basics, and more… these are things that you will use no matter what you do in SQL.

Lessons

• Introducing databases
• The database table
• SQL basics
• SSMS basics
• Query basics
• The metadata

Lab

• Database Concepts and SSMS

The Relational Model

Any discussion about relational databases will inevitably require an understanding of the Relational Model. The RM describes the organization and structure of the database and will have an impact on almost everything in this course and back at work. Also, understanding this important topic is the first step in understanding and applying joins.

Lessons

• Introducing the Relational Model
• The need for joins
• Table relationships

Lab

• Table Relationships

Getting the Data

The FROM clause always references a table. The table can be a database table, it can be generated by table-type functions, views, subqueries or joins. In this module, our focus will be on joins and subqueries.

Lessons

• The FROM clause
• Single-join queries
• Multiple-join queries
• Derived-table Subqueries

Labs

• Combining two tables with a Join
• Combining multiple tables with a Join

Filtering the data

Now that we can use the FROM clause to define the base table of our query, we need a way to select what we want to include in our results and what we want to exclude. In this module, we look at different ways we can use the WHERE clause to filter the data.

Lessons

• Introduction
• Expressions
• Data type precedence
• Advanced filtering

Lab

• Defining the result set

Displaying the data

At this point, we have learned how to define the data to query using the FROM and WHERE clauses. We are ready to project the results from our query and look at ways that the SELECT clause can be used to affect the rows that the query returns. We will also examine several of the system functions..

Lessons

• Introduction
• The ORDER BY clause
• The column list
• System functions
• CASE expression

Lab

• Controlling output rows

Aggregating the data

All levels of management need information to provide decision support. Lower levels of management may need to make decisions about what products and how much to have in stock, and higher levels of management may need to understand industry trends to support strategic decisions about where to guide the company. In this module, you will learn how to create Aggregate queries; they provide this powerful type of high-level information.

Lessons

• Introduction
• Aggregation with GROUP B

Lab

• Grouping data

Maintain the data

Everything we’ve seen so far in this course has been about reading the data. In this module, we end the course with a look at the three write operations that we collectively call data maintenance: Insert, delete, and update.

Lessons

• Inserting data
• Updating data
• Deleting data

Lab

• Final Scenario