Learn how to use the UNION operator in SQL, a set operation that combines the rows from two or more queries into one result set. Discover the benefits, limitations, and examples of using it.

Learn how to use the EXCEPT operator in SQL to compare and contrast data from different queries and filter out unwanted rows. Discover some use cases, limitations, and modifications of the EXCEPT ...

The essay analyzes the fundamental reason behind slow SQL statements and provides the solution to make improvements through code samples. It is not uncommon to use the IN operator in WHERE statement.

The IN operator in SQL is used to filter records based on whether a column's value matches any value in a specified list. It simplifies writing multiple OR conditions in a query.