DP-080T00: Querying Data with Microsoft Transact-SQL

Duration: 5 Days

This course will teach the basics of Microsoft's dialect of the standard SQL language: Transact-SQL. Topics include both querying and modifying data in relational databases that are hosted in Microsoft SQL Server-based database systems, including: Microsoft SQL Server, Azure SQL Database and, Azure Synapse Analytics.

Module 1: Getting Started with Transact-SQL

In this module you will learn about the basics of the Transact-SQL (T-SQL) language, as well as general propertiesproperties and terminology of relational databases. This module will also introduce the basic SELECT statement for retrieving data from a table.

Introduction to Transact-SQL

Using the SELECT statement

Lab : Get started with SQL Server query tools and writing queries in T-SQL

After completing this module, students will be able to:

Using a query tool to write and execute queries in Transact-SQL.

Understand the basic concepts of relational database and the T-SQLlanguage

Write SELECT statements to retrieve data from a relational database table

Understand basic datatypes and how they are used

Understand the basics of NULL values

Module 2: Sorting and Filtering Query Results

In the module you will learn how to control what data is returned, the order in which it isreturned. You will use the ORDERBY clause, with and without paging. You will learnabout various kinds of filters that can be used in the WHERE clause to control whichdata rows are returned. You will also learn how to manage the results by removing

duplicates with DISTINCT.

Sorting query results

Filtering the data

Lab : Sort and filter data returned by SELECT queries

After completing this module, students will be able to:

Use ORDER BY to sort results from a T-SQL SELECT statement.Add a TOP clause to limit the ordered rows returned

Page the sorted data with OFFSET-FET.Write WHERE clauses to filter the rows returned.

Use DISTINCT to eliminate duplicate rows in the results

Module 3: Using Joins and Subqueries

In this module, you will explore T-SQL queries which access data from multiple tables with varioius kinds of JOINoperations and simple subqueries.

Using JOIN operations

Using subqueries

Lab : Write queries with JOIN operations

Lab : Write SELECT statements using subqueries

After completing this module, students will be able to: Write queries accessing data from multiple tables using JOIN operations. Understand the differences between type of JOIN operations: INNER JOIN, OUTER JOIN, CROSS JOIN. Understand how to join a table to itself with a self-join Write subqueries within a SELECT statement. Understand the difference between scalar and multi-valued subqueries Understand the difference between correlated and self-containedsubqueries

Module 4: Using Built-in Functions

In the module you will explore the use of built-in functions for returning computed or special values in the

SELECT list or in the WHERE clause. Functions include mathfunctions, string functions and system functions. There are other types of functions thatwill be mentioned, but not discussed in detail. You will also learn how to combine rows

of data into a single group, providing summary information for the group such as SUM,MIN or MAX.

Getting started with scalar functions

Grouping aggregated results

Lab : Built-in functions

After completing this module, students will be able to: Write queries using scalar functions.Write queries using aggregate functions.Use GROUP BY to combine data into groups based on a common columnvalue.Understand how HAVING is used to filter groups of rows

Module 5: Modifying Data

In this module, you will learn the T-SQL statements for modifying table data including UPDATAE, DELETE and

MERGE as well as various options for INSERT including creating anew table with data from an existing table. You will also

look at how to have the systemautomatically supply values for columns as the data is inserted.

Inserting data into tables

Modifying and deleting data

Lab : Modify data

After completing this module, students will be able to:

Insert data into an existing table.Specify that a column should be automatically populating with an IDENTITY

or a SEQUENCE value

Modify data using the UPDATE statement

Delete data using the DELETE statement

Modify data using MERGE to synchronize two tables

Audience Profile

This course can be valuable for anyone who needs to write basic SQL or Transact-SQL queries. This includes anyone working with data as a data analyst, a data engineer, a data scientist, a database administrator or a database developer. It can also be useful for others peripherally involved with data, or wanting to learn more about working with data such as solution architects, students and technology managers.

Pre-Requisites

Basic knowledge of the Microsoft Windows operating system and its core functionality

Working knowledge of relational databases