For this example you create a view descriptor, VLIB.ALLEMP, based on SYBASE data. The outer PROC SQL query retrieves data from the view descriptor; the subquery uses a Pass-Through query to retrieve ...

A subquery, also known as an inner query or nested query, is a query nested within another SQL query. Subqueries are often used to retrieve data that will be used in the main query to further filter, ...

WHERE month != (SELECT MAX(Month) FROM Employee WHERE id = e.id) ...

For example, some DBMSs support different syntax, functions, or operators for subqueries and joins. You should be aware of these differences and follow the SQL standards and conventions for your ...

For example, you can use a correlated subquery to find the customers who ... EXPLAIN to gain insights into the execution of our SQL queries, providing information about the database engine's ...

The result of a NOT EXISTS condition is true if the subquery evaluates to zero rows. For example, the following query subsets ... all the employees from PROCLIB.PAYROLL who live in CT. proc sql; ...