Question

嘿伙计们，我有一个只输出表格列的存储过程。相反，我想要'有'[列数]'学生'。作为输出。以下示例。

CREATE OR REPLACE PROCEDURE active_students (arc in out sys_refcursor)
       as
       begin
            open arc for select count(*) from student;
       end;

这会生成

Count(*)
30

希望阅读

There are 30 students.

Answer 1

使用：

CREATE OR REPLACE PROCEDURE JSU4290M.active_students (arc in out sys_refcursor)
AS
BEGIN

  OPEN arc FOR 
  SELECT 'There are '|| COUNT(*) ||' students.' AS col
    FROM STUDENT;

END;

双管道（||）是Oracle（现在是ANSI标准）连接字符串的方法。 Oracle将隐式地将整数值转换为字符串。

存储过程输出字符串和光标

1 个答案: