You often need data that are stored in separate tables. For example, you may want to produce a report that gets information about flight delays from one table and boarding capacity from another.

In the original proposal for the World Wide Web, Tim Berners-Lee wrote: A generic tool could perhaps be made to allow any database which uses a commercial DBMS to be displayed as a hypertext view. We ...

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.

SQL Server 2016 and Azure SQL Database both give you tables that automatically keep track of the history of your data. Here's how to retrieve that historical data. In an earlier column, I showed how ...