您要如何处理SELECT返回的数据?如果您只想查看它，则根本不需要PL/SQL，只需在SQL Plus中执行此操作:

What do you want to do with the data that the SELECT returns? If you just want to see it you don't need PL/SQL at all, just do this in SQL Plus:

variable var number
exec :var := 1

select * from SomeTable where SomeField = :var;

或者在SQL Developer或Toad之类的工具中，只需执行以下操作:

Or in a tool like SQL Developer or Toad, just do this:

select * from SomeTable where SomeField = :var;

，它会提示您输入:var的值.

and it will prompt you to enter the value for :var.