我怎么能写这个代码在oracle中工作？

Question

如何编写此代码（Sql Server）以在Oracle PL / SQl中工作？

  DECLARE @ID INTEGER

  SELECT @ID = ISNULL(MAX(EmployeeID),0) + 1

  FROM EmployeeTable

Answer 1

以下是oracle

的等效代码

declare
    id number;
    begin
    select nvl(max(employeeid),0)+1 into id from employeetable;
    dbms_output.put_line(id);
    end;

Answer 2

试试这个PL / SQL块：

DECLARE ID INTEGER;

BEGIN
SELECT
    NVL(MAX(EmployeeID),0) + 1 INTO ID
FROM
    EmployeeTable
END;
/