variable « SQL Plus « Oracle PL / SQL

1.refcursor varible
2.Save returning value from a function to a variable
3.Define variable and print its value out
4.Define variable and set value
5.Define variable and use it in sql statement
6.Bind variables can be declared in your SQL*Plus script,Preface a bind variable with a colon to reference it in a PL/SQL block
7.Bind variables can even be referenced by SQL queries
8.Undefine variable
9.User defined-variable in update set statement