Plsql 动态使用SELECTINTO语句

以下功能有什么问题

create or replace function getNameById(myId in number) return number
is
  query varchar2(500);
  myName varchar2(20);
begin


  query :='SELECT users_name INTO :myname FROM USERS_TABLE WHERE USERS_ID = :myid';

  execute 
  immediate query 
  USING out myName, myId;

  dbms_output.put_line(myName);
  return(myName);
end getNameById;

如果我不使用查询，而是使用：

SELECT users_name INTO myName FROM USERS_TABLE WHERE USERS_ID = 81;

然而，执行成功了

问题是，当我添加“INTO:myname”时，执行时会出现错误

在执行动态sql时是否不能使用INTO

编辑：解决了

create or replace function getNameById(myId in number) return varchar2
is
  query varchar2(500);
  myName users_table.users_name%type;

begin

  query :='SELECT users_name FROM USERS_TABLE WHERE USERS_ID = :myid'; 
  execute immediate query INTO myName USING myId;

  dbms_output.put_line(myName);
  return(myName);

end getNameById;

---

无法在Oracle dynamic SQL中绑定表名。您需要将表名直接放入动态SQL中。请尝试改用以下存储过程：

CREATE OR REPLACE PROCEDURE getNameById (
   myName IN VARCHAR2,
   myId IN NUMBER) AS
   where_clause VARCHAR2(100) := ' WHERE USERS_ID = ' || myId;
BEGIN
   EXECUTE IMMEDIATE 'SELECT users_name INTO ' || myname || ' FROM USERS_TABLE' || where_clause;
END;

---

阅读和了解更多信息。

您不需要在select语句中使用into

create or replace function getNameById(myId in number) return number
is
    query varchar2(500);
    myName varchar2(20);
    rezult varchar(100);
begin

    query :='SELECT users_name FROM USERS_TABLE WHERE USERS_ID = '||myid;

        execute 
        immediate query 
        into rezult;

  dbms_output.put_line(rezult);
  return(rezult);
end getNameById;