First of all, a recursive query is implemented using the WITH clause (using a CTE). The CTE is named EXPL. The first SELECT primes the pump to initialize the “root” of the search. In our case, to ...

Because the SQL procedure is based on the Structured Query Language, it works somewhat differently than some SAS procedures. For example, the SQL procedure executes without a RUN statement when a ...

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 ...

In addition to using subselects to examine data in related tables, it’s also possible to use an aggregate function in a WHERE clause subselect to make a determination about the primary result set.