You have mastered the basics of writing simple SQL queries — now it’s time to take it further.
This intermediate-level course builds on your knowledge and helps you to work more confidently with relational data. You will learn how to join multiple tables, use built-in functions, and group and summarise data to answer more complex business questions.
Course overview
This one-day course is ideal for people who want to dig deeper into SQL without getting too technical. You will explore how to bring together data from different tables using JOINs, write queries that return meaningful summaries, and use functions to manipulate and analyse data. It is practical, hands-on and focused on real-world scenarios you are likely to face in your work.
Duration
1 day
Classroom size
6 approx.
Location
Online or Classroom
Certificate
Certificate of Attendance
Experience
Intermediate
This course will be taught in the latest version of the software. We can train this in older versions if needed – please get in touch for more information and availability.
We start by examining the training database and briefly recap SQL the basic SELECT statement and JOINs with a quiz and exercise.
This section includes several useful exercises for querying data from multiple tables. Topics include:
Sub Queries allow you to control the data returned from your main query with the results from another query. A typical example might be to first calculate the total that a customer has spent with you during the year, then use this query to return the customers that have spent above average. You can also use sub queries to find duplicate data.
Window functions can be used to combine individual data with aggregate data. For example, in the same query you could display an individual’s salary, the average salary for the department/company and calculate the difference. Window functions belong to a type of function known as a ‘set function’, which means a function that applies to a set of rows. The word ‘window’ is used to refer to the set of rows that the function works on.
During the session of the workshop we complete various exercises:
SQL offers a number of ways to consolidate and aggregate the output of your queries. We begin by learning how to calculate the SUM, COUNT AVERAGE, MIN and MAX across the whole dataset and then look at how to write GROUP BY queries and limit these with the HAVING clause.
The key topics trained include:
This course is only available as a one-to-one or private group booking.
For pricing and availability, send us a message using the form, leave us a message on 020 7375 7300, or speak to an Account Manager straight away using our Live Chat service in the bottom right of your screen!
If you have three or more learners, a private group training could be cheaper.
We can tailor the content to your team, and host the training remotely, at your workplace or here at Happy’s HQ in Aldgate, Central London.
We want everyone to go away from our courses feeling as though they have learnt useful, practical skills that they can use straight away when they go back to work.
If you don’t feel that your training has been useful or if you are unhappy in any way, please get in touch with our Customer Services team within 30 days of the course.
We will be happy to offer you additional support and training free of charge to help you to gain the skills you need, or if you’d prefer, a full refund.
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Both available for public and private dates.
All learners will need to install Zoom on their machines. Full technical requirements are on the Zoom website. Your link will be included in your joining instructions once you have booked your place — if you haven’t received this email then please contact our team.
Learners should log into the session 10 minutes before the start time to ensure that they have downloaded and set up Zoom correctly. The course will start precisely on time and it may not be possible to go back over material missed by late arrivals. Unfortunately you will be asked to leave and attend a different day if you arrive more than 15 minutes late for online sessions, and more than 30 minutes late for classroom sessions.
Please ensure you read our Terms and Conditions before booking for our payment terms and cancellation policy.
All public classroom sessions take place at Happy’s HQ in London at Robert Dolan House, 9 Alie Street, London E1 8DE. Please see our Contact Us page for full directions and a PDF map.
The course will run from 10am to 4:45pm (lunch is served 1pm to 1:45pm — we offer a choice of 3 cold bowl dishes). Please be careful to arrive by 9:45am for registration and refreshments. The course will start precisely on time and it may not be possible to go back over material missed by late arrivals. If you arrive over 30 minutes late you may be asked to leave and attend another day.
Please ensure you read our Terms and Conditions before booking for our payment terms and cancellation policy.
If you are a Mac user, please let us know when booking. If the course is held in the classroom at Happy, the training is held on PCs so we recommend that you bring your Macbook with you (we are not able to provide an additional monitor).
For online training, please let us know when booking and you can use your Mac as normal.
We provide a PDF with shortcuts for Mac users and your trainer will refer to this throughout the training.
Our public course is designed for Windows users only due to the large differences between the Apple and Microsoft versions of Outlook. We can hold this as a private group session for Mac users — please get in touch for pricing and availability.
Our learning sessions are thoughtfully designed to be inclusive of all learners by accommodating a variety of learning styles and preferences. We recognise that individuals process and engage with information differently, so each session includes a range of practical exercises that allow participants to interact with the material in ways that best suit them. Whether through hands-on activities, visual aids, group discussions, or individual reflection, we strive to create a supportive and flexible learning environment where everyone can thrive. Learn more about ways that we can support your learning here.
If you are eligible for a discounted rate you will see this on the final stage of the shopping cart after you have either logged in or set up your account (if you are a new user). Discount codes can also be added on this final page.
If you have any issues, get in touch with our friendly team for help.
For our public dates, if you give us at least 14 days’ notice, you can rebook on another date or cancel your place at no extra cost. For less than 14 days, there is a charge – please see our Terms and Conditions for full details. If a colleague can take your place, no extra fee applies (even if it’s at the last minute).
For private group bookings, there is no charge if you give us at least 28 days’ notice. Cancellations after this time will incur 100% of the cost of the course. Please speak to your Account Manager or email speak to our friendly team.
For our digital skills courses, we provide one PC per learner, so you do not need your laptop.
For all courses, we provide all supporting materials, such as manuals, pens, sticky notes and refreshments, so you don’t need to bring anything with you.
Lunch is provided on full-day courses, but not on half-day courses.
We are based at Robert Dolan House, 9 Alie Street, London E1 8DE. We are just 5 minutes’ walk from Aldgate and Aldgate East.
Please see our Contact Us page for a map and directions, or search on Google Maps for Happy Ltd. [can this link jump down to the map/directions section under the form?]
For private group bookings, we can hold this course at Happy, inhouse at your workplace, or at a location of your choice, as long as you have a suitable space.
We accept all credit and debit cards through Stripe (including American Express). You can also pay by invoice, both for our public dates and private group bookings. Your invoice should be emailed to you at the time of booking. If you haven’t receive this please contact our team.
After attending your course, you will receive a certificate of attendance.
If your chosen course is certified by the CPD Certification Service, you can track and log your hours of learning using the myCPD Portal.
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3rd Floor
Robert Dolan House, 9 Alie Street
London E1 8DE
United Kingdom
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