Oracle SQL: variables used in place of table names

1. You need to have a space between the table name and the subsequent WHERE clause
2. The INTO needs to be part of the EXECUTE IMMEDIATE, not part of the dynamic SQL statement.
3. The dynamic SQL statement should not have a trailing semicolon
4. The EXECUTE IMMEDIATE statement should end with a semicolon

Putting those together, something like this should work

declare   VR_TABLE VARCHAR2(256);  VR_UPDATE VARCHAR2(256);begin  VR_TABLE :='SYSTEM_STATUS';  EXECUTE IMMEDIATE 'select UPDATE_VERSION from ' || VR_TABLE || ' where rownum < 2'               INTO VR_UPDATE;end;

Of course, since you're not doing anything with VR_UPDATE, nothing will be displayed when this anonymous block is executed.

INTO part of the query should not be directly included in the querystring.

Syntax

EXECUTE IMMEDIATE(<SQL>)[INTO<variable>][USING <bind_variable_value>]

The above syntax shows EXECUTE IMMEDIATE command.

Clause INTO is optional and used only if the dynamic SQL contains a select statement that fetches values. The variable type should match with the variable type of the select statement.

Clause USING is optional and used only if the dynamic SQL contains any bind variable.

https://www.guru99.com/dynamic-sql-pl-sql.html#2

You can visit this site for a better understanding of Dynamic SQL.