This tutorial will guide you through creating an alias
for each of the tables in the SELECT statement. An alias is an indirect
method of referencing a table so that a SQL statement can be independent
of the qualified name of that table. If the table name changes, only
the alias definition must be changed.
Table aliases can be added when you add the table to the
statement, or after the table is added, by using the context menu
in the
Tables pane. You can also use this context
menu to delete tables or create joins between tables.
The aliases
for the CUSTOMERS, RENTALS, and VIDEOS table will be C, R,
and V respectively.