Transact-SQL Querying

Beskrivelse


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. Skills gained:

  • Use SQL Server query tools
  • Write SELECT statements to retrieve columns from one or more tables
  • Sort and filter selected data
  • Use built-in functions to returned data values
  • Create groups of data and aggregate the results
  • Modify data with Transact-SQL using INSERT, UPDATE, DELETE and MERGE

Indhold


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 properties and terminology of relational databases. This module will also introduce the basic SELECT statement for retrieving data from a table.
  • Lessons
  • Introduction to Transact-SQL
  • Using the SELECT statement
  • Lab : Get started with SQL Server query tools and writing queries in T-SQL 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 is returned. You will use the ORDER BY clause, with and without paging. You will learn about various kinds of filters that can be used in the WHERE clause to control which data rows are returned. You will also learn how to manage the results by removing duplicates with DISTINCT.
  • Lessons
  • Sorting query results
  • Filtering the data
  • Lab : Sort and filter data returned by SELECT queries Module 3: Using Joins and Subqueries
  • In this module, you will explore T-SQL queries which access data from multiple tables with various kinds of JOIN operations and simple subqueries.
  • Lessons
  • Using JOIN operations
  • Using subqueries
  • Lab : Write queries with JOIN operations
  • Lab : Write SELECT statements using subqueries 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 math functions, string functions and system functions. There are other types of functions that will 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.
  • Lessons
  • Getting started with scalar functions
  • Grouping aggregated results
  • Lab : Built-in functions Module 5: Modifying Data
  • In this module, you will learn the T-SQL statements for modifying table data including UPDATE, DELETE and MERGE as well as various options for INSERT including creating a new table with data from an existing table. You will also look at how to have the system automatically supply values for columns as the data is inserted.
  • Lessons
  • Inserting data into tables
  • Modifying and deleting data
  • Lab : Modify data

Transact-SQL Querying

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