GROUP BY and HAVING in SQL Explained | Tutorial For Beginners

Hello Everyone,
Welcome to the most comprehensive SQL basic course on RUclips.
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If you are just starting with aggregations, please watch first video :
• Aggregate Functions in...
Topics covered :
1. Definition of GROUP BY : Create groups of similar rows for performing calculations and aggregations
2. Behaviour of GROUP BY clause with single and multiple columns
3. Use of GROUP BY statement (it can be used to find distinct columns but should we do that?) with example
4. Using GROUP BY with aggregate functions
5. Definition of HAVING : Filters groups created by GROUP BY
6. Usage of HAVING with example
7. Order of execution of a SQL query
8. Difference between WHERE and HAVING clause in SQL.
Script for explaingroup :
drop table explaingroup;
create table explaingroup (
col1 char(1),
col2 int );
insert into explaingroup values
('A',1),
('A',1),
('A',2),
('B',1),
('B',2),
('B',2),
('B',3),
('B',3);
select * from explaingroup;
Happy Querying
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