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 ...

The DICTIONARY tables component is specified in the FROM clause of a SELECT statement. DICTIONARY is a reserved libref for use only in PROC SQL. Data from DICTIONARY tables are generated at run time.

Beginning in Version 7 of SAS software, SAS variable names and member names can be up to 32 characters long. Column names can be case-sensitive also. Some DBMSs allow case sensitive column and table ...