Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement. It’s sometimes difficult to know which SQL syntax to use when ...

Search within a result set. The concept of a subselect is simple: One select query is nested inside another query, creating a resource otherwise unavailable for searching in a single statement.

Okay, forgive me if I'm missing something obvious. I'm suffering from lack of sleep caused by adopting a puppy over the weekend. So, I've got the following start to a query: UPDATE SCHED_FC_IDP ...

This value is inserted in the query, as if the query were written: select empid, lastname, firstnam from vlib.allemp where dept like &dept and salary < 57840.86; ... However, as the SAS log in SAS Log ...

The result of an EXISTS condition is true if the subquery resolves to at least one row. The result of a NOT EXISTS condition is true if the subquery evaluates to zero rows. For example, the following ...