What are examples of complex SQL queries?

What is considered complex query?

As the name suggests, a complex query has a complex syntax and can comprise multiple parts. A purpose of such a query is to search data based on several parameters. For instance, a complex query can include several joins across tables or have subqueries (a query nested within another query).

How do I write a complex query in SQL?

Identify all the tables you'll need in the query. Join tables containing the data you need to display or the data used in the WHERE part of the query. Display all data to check if you've joined everything correctly and to see the result of such a query.

What is simple and complex queries?

There are 2 types of Views in SQL: Simple View and Complex View. Simple views can only contain a single base table. Complex views can be constructed on more than one base table. In particular, complex views can contain: join conditions, a group by clause, a order by clause.

What is a SQL query example?

An SQL SELECT statement retrieves records from a database table according to clauses (for example, FROM and WHERE ) that specify criteria. The syntax is: SELECT column1, column2 FROM table1, table2 WHERE column2='value';