如何在Oracle PL/SQL where子句中使用变量 [英] How to use variables in an Oracle PL/SQL where clause

问题描述

我似乎无法使变量在Oracle PL/SQL where子句中工作.我来自Microsoft SQL Server背景，这很容易.例如，执行类似于以下操作的所有步骤将是什么?

I can't seem to get variables to work in an Oracle PL/SQL where clause. I come from a Microsoft SQL Server background and there it was easy. For example, what would be all steps needed to do something similar to the following?

declare @var int set @var = 1

select * from SomeTable where SomeField = @var

在PL/SQL中这似乎不应该很难，但是显然可以. :-/听说我需要在PL/SQL中使用游标等?

This doesn't seem like it should be hard in PL/SQL, but evidently it is. :-/ I hear I need to use cursors and the like in PL/SQL?

任何帮助将不胜感激.谢谢.

Any help would be greatly appreciated. Thanks.

推荐答案

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.

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