Query-expressions are called subqueries when used in WHERE or HAVING clauses. A subquery is a query-expression that is nested as part of another query-expression. A subquery selects one or more rows ...

Explore the differences and benefits of query expression syntax, method syntax, deferred execution, immediate execution, standard operators, and custom operato Skip to main content LinkedIn Articles ...

Joining is an important operation in queries that target data sources that have no navigable relationships to each other, such as relational database tables. A join of two data sources is the ...

Learn how to filter data in SQL queries based on a range of values with the BETWEEN operator. Find out how to use it with numbers, dates, strings, and the NOT BETWEEN operator.

When you execute a query using the LEFT JOIN syntax, SQL does two things: It returns all of the records from both tables that contain matching values, as defined by the ON clause.

PROC SQL provides traditional set operators from relational algebra: OUTER UNION concatenates the query results. UNION produces all unique rows from both queries. EXCEPT produces rows that are part of ...