Advanced SQL Course

Course 929

Duration: 3 days
Labs: Yes
Language: English
Level: Advanced

Structured Query Language (SQL) is the cornerstone of all relational database operations. In this hands-on Advanced SQL course, you will learn how to exploit the full potential of the SELECT statement to write robust queries using the best query method for your application, test your queries, and avoid common errors and pitfalls. It also teaches alternative solutions to given problems, enabling you to choose the most efficient solution in each situation.

Advanced SQL Course Delivery Methods

In-Person
Online

Advanced SQL Course Information

In this Advanced SQL Course, you will learn how to:

Maximise the potential of SQL to build powerful, complex, and robust SQL queries.
Query multiple tables with inner joins, outer joins, and self joins.
Construct recursive common table expressions.
Summarise data using aggregation and grouping.
Execute analytic functions to calculate ranks.
Build simple and correlated subqueries.
Thoroughly test SQL queries to avoid common errors.
Select the most efficient solution to complex SQL problems.

Advanced SQL Course Prerequisites

This is an advanced course, and knowledge of the basics of SQL at the level of Learning Tree course 925, Introduction to SQL Course, or equivalent is assumed.

Advanced SQL Course Instructor-Led Outline

Module 1: Introduction and Overview

SQL fundamentals

Why SQL can be both easy and difficult
Recommendations for thorough testing

Retrieving data with SELECT

Expressions
Literals
Handling NULLs properly

Executing queries

Analysing query plans
Enhancing query performance
Retrieving partial results with FETCH and OFFSET
Selecting the best alternatives
Avoiding errors and pitfalls

Module 2: Querying Multiple Tables

Implementing various types of joins

Inner joins
Cross joins
Left, right, and full outer joins
Equijoins vs. theta joins
The performance implications of joins
Adding filter conditions to outer joins

Writing self joins

Joining a table to itself
Chaining self joins
Solving time-interval problems

Combining queries with set operators

UNION
UNION ALL
INTERSECT
EXCEPT

Module 3: Aggregate Functions

Summarising data with aggregate functions

COUNT
SUM
AVG
MIN
MAX
Managing NULLs
identifying duplicates

Grouping data

GROUP B
Applying conditions with HAVING
Calculating moving averages
Building crosstab reports

Extending group queries

Nesting grouped aggregates
Joins and grouping
Introducing subtotals with CUBE and ROLLUP

Module 4: Performing Extensive Analysis with Analytic Functions

The OVER clause

Specifying the ordering before applying the function
Splitting the result set into logical partitions

Calculating ranks

RANK and DENSE_RANK
ROW_NUMBER with ordered sets
Calculating percentiles

Extending the use of aggregates

Partitioning in multiple levels
Computing running totals
Comparing row and aggregate values
Top-N queries
Defining sliding window boundaries

Module 5: Building Subqueries

Self-contained subqueries

Subqueries in conditions and column expressions
Creating multilevel subqueries
Avoiding problems when subqueries return NULLs
Handling multirow subquery results
Finding gaps in number series

Correlated subqueries

Accessing values from the outer query
EXISTS vs. IN
Identifying duplicates
Avoiding accidental correlation

Common table expressions

Reusable subqueries
Recursive subqueries
Traversing hierarchies

Module 6: Breaking Down Complex Queries

Overcoming SQL limitations
Reducing complexity and improving performance

Get This Course £2,075

3-day instructor-led training course
One-on-one after-course instructor coaching
Learning Tree end-of-course exam included
After-course computing sandbox included

Include dates with afternoon start times

#929

Guaranteed to Run - You can rest assured this class will not be canceled. Delivery format is subject to change – please call Customer Service if you have any questions.
Sep 24 - 26 2:00 PM - 9:30 PM BST

Virtual
Guaranteed to Run - You can rest assured this class will not be canceled. Delivery format is subject to change – please call Customer Service if you have any questions.
Oct 1 - 3 2:00 PM - 9:30 PM BST

Virtual
Oct 29 - 31 1:00 PM - 8:30 PM GMT

Toronto or Virtual
Nov 12 - 14 2:00 PM - 9:30 PM GMT

New York or Virtual
Nov 19 - 21 9:00 AM - 4:30 PM GMT

London or Virtual
Dec 3 - 5 3:00 PM - 10:30 PM GMT

Austin or Virtual
Dec 17 - 19 9:00 AM - 4:30 PM GMT

London or Virtual
Jan 14 - 16 2:00 PM - 9:30 PM GMT

Herndon, VA or Virtual
Feb 11 - 13 9:00 AM - 4:30 PM GMT

London or Virtual
Mar 18 - 20 1:00 PM - 8:30 PM GMT

Ottawa or Virtual
Mar 25 - 27 9:00 AM - 4:30 PM GMT

London or Virtual
Apr 8 - 10 2:00 PM - 9:30 PM BST

New York or Virtual
Apr 22 - 24 3:00 PM - 10:30 PM BST

Austin or Virtual
May 13 - 15 9:00 AM - 4:30 PM BST

London or Virtual
Jun 3 - 5 2:00 PM - 9:30 PM BST

Herndon, VA or Virtual
Jun 24 - 26 9:00 AM - 4:30 PM BST

London or Virtual
Jul 22 - 24 2:00 PM - 9:30 PM BST

Ottawa or Virtual
Aug 26 - 28 2:00 PM - 9:30 PM BST

New York or Virtual

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#929

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Advanced SQL Queries Course FAQs

The SQL Language is an ANSI/ISO standard language used by all relational database products.

For the hands-on exercises, you will choose between working with the PostgreSQL database product or Microsoft SQL Server.

Yes! We know your busy work schedule may prevent you from getting to one of our classrooms which is why we offer convenient online training to meet your needs wherever you want, including online training.