Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement.

If tables selected for joining have a relation defined between them, Query and Reporting joins them automatically; see Joining Tables Automatically for more information. If the tables do not have a ...

Figure A We’ll use these two tables to demonstrate how JOINs affect your queries. Notice that the Donors table contains five records, each representing a different person.

Passing Joins to the DBMS Prior to Version 7 of the SAS System, an SQL query involving one or more DBMS tables or view descriptors was processed by the SQL procedure as if the DBMS tables were ...