Non-PL/SQL variables: bind and host Objective Use non-PL/SQL bind, host variables to manipulate dat A bind variable is a variable that you declare in a host environment and then use to pass runtime values. These values can be character or numeric. You can pass these values either in or out of one or more PL/SQL programs, such as packages, procedures, or functions. SQL*Plus is a good example of a host environment.
Objective Use non-PL/SQL bind, host variables to manipulate dat A bind variable is a variable that you declare in a host environment and then use to pass runtime values.
These values can be character or numeric. You can pass these values either in or out of one or more PL/SQL programs, such as packages, procedures, or functions.
SQL*Plus is a good example of a host environment.
http://www.relationaldbdesign.com/programming-pl-sql/module2/non-pl-sql-var-bind-host.php
内容很少。说得还可以。举例子说的