A Subquery is a query within another SQL query and embedded within the WHERE clause. A subquery is used to return data that will be used in the main query as a condition to further restrict the data ...

SQL is an easy to learn yet powerful language when it comes to Data Analysis. There are however, some functionalities that usually take longer to understand and therefore put into practice. One of ...

The SQL Narrator is able to narrate nested queries cascaded with balanced parentheses. The generated narrations can be used in assisting students to comprehend nested SQL queries in learning ...

Abstract: In a fuzzy relational database where a relation is a fuzzy set of tuples and ill-known data are represented by possibility distributions, nested fuzzy queries can be expressed in the Fuzzy ...