SAS evaluates select-expression, if present, as well as when-expression-1. If the values of both expressions are equal, then SAS executes the statements associated with when-expression-1. If the ...

Tip: Although you can maintain a selection list for one destination and an exclusion list for another, it is easier to understand the results if you maintain the same types of lists for all the ...

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 ...