Learn what subqueries are, how to use them in SQL queries, and some best practices to follow. Subqueries can help you simplify complex queries, filter data, perform calculations, and join tables.

In a correlated subquery, the WHERE expression in a subquery refers to values in a table in the outer query. The correlated subquery is evaluated for each row in the outer query. With correlated ...

As a result, you can now create a PROC SQL view, DATA step view, or SAS/ACCESS view with DBMS data. For this example you create a view descriptor, VLIB.ALLEMP, based on SYBASE data. The outer PROC SQL ...