SQL Queries Level 2 Live Online Learning Courses
This one-day SQL (Structured Query Language) workshop is for data analysts who need to summarise and interrogate data. This is a follow up to the introduction course and will continue to develop your skills in writing SQL in order to manipulate data stored in a relational database system.
This workshop is suitable for anyone who needs to learn SQL, whatever database system you use. The training is typically delivered using MS SQL Server and SSMS, so please let us know what system you use.
Please note, SQL Queries Level 2 is only available for private groups.
This online workshop runs from 9.30am to approximately 4.30pm with regular breaks. It is possible to split the workshop into 2x ½ days. Please let us know your preference. A maximum of six attendees means there is plenty of opportunity for you to ask questions.
What you will learn
By the end of this course you will be able to write SQL SELECT statements confidently. You will be able to retrieve data from one or more tables using a variety of criteria, and know how to write advanced SELECT queries that use union and case statements, and sub queries.
Session 1 – Introduction and Recap
We start by examining the training database and briefly recap SQL the basic SELECT statement and JOINs with a quiz and exercise.
Session 2 – Advanced SQL SELECT Statements
This section includes several useful exercises for querying data from multiple tables. Topics include:
- CASE statements
- Union vs Union All
- Useful string, date and convert functions
Session 3 – Sub Queries and Window Functions
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:
- Examples of useful sub queries
- Introduction to Window functions
- Over() and Over(Partition by)
- Row() v Rank()
If you have any questions about the workshop content or setup please let us know and we’ll arrange for the trainer to give you a call.
Group Learning Events
If you have three or more learners, a private group course 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.
What's it like to learn online with Happy?
In this short video, Rachael explains how Happy makes our Live Online Learning IT programmes just as interactive and engaging as our classroom sessions.
The Small Print
This online workshop runs from 9.30am to approximately 4.30pm with regular breaks. It is possible to split the workshop into 2 x ½ days. Please let us know your preference.
The workshop typically uses MS SQL Server and SSMS, so it is important that you have this set up on your own computer prior to the training. It is possible to adapt the workshop for MySQL, for Access or for BigQuery. Please let us know the version you use before booking. A free version of MS SQL Server Express and Tools can be downloaded here.
Your active participation is expected. We recommend you have a headset with a microphone so you can speak to the trainer. It is also important to have a large computer screen, or even two screens, so you can comfortably work whilst referring to the manual or the trainer’s shared screen.
Please ensure you read our Terms and Conditions before booking for our payment terms and cancellation policy.
The happy Guarantee
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, just 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.
Your post-course support package
- Included in the price of both online and classroom programmes
- 2 years of free access to our IT Helpline
- Unlimited access - call or email our team as often as you need
- Ask about any content covered on your course
Testimonials from happy customers
Right level, including and relaxed feeling.
The course was well structured and the tutor was very patient and knowledgeable and helped us all. My headset decided to die about 10 minutes from the end but he wasn't p...
Trainer was excellent. Involved the whole group. Speed and tempo of training was just right. Were able to bring our own experiences and plans for the future.
Amanda Adegoke1 day ago
Really informative and relevant contact and the delivery was excellent.
Sam Giles3 days ago
Instructor was patient and tailored everything to people of all levels.
Trusted Customer3 days ago
Online classes are not a good idea when you have to use one screen to look at three things at the same time. Listen to the tutor, look at what they do on one screen and a...
Trusted Customer3 days ago
Training was great, easy to follow.
Pablo Barrio3 days ago
Great tips during the training. I liked a lot the spreadsheet that helps decide what structure is better depending on the problem at hand.
Trusted Customer4 days ago
Straightforward and efficient. Course was easy to book; communication was straightforward; course joining instructions were clear.
Trusted Customer13 days ago
Fairly good customer experience - all training materials provided on time. Good reminders leading up to the course.
Tom Ellis14 days ago
Good course, with a good and involving lead presenter on it. Felt it really delivered against the brief.
Trusted Customer14 days ago
Excellent communication throughout