oracle函數及預存程序

來源:互聯網
上載者:User

標籤:

1、函數

  create or replace function getTableCount(table_name varchar2) return number as
  begin
    declare sql_query varchar2(300);
    t_count number;
    begin
      sql_query:=‘select count(*) from ‘ || table_name;   //from後面有個空格
      execute immediate sql_query into t_count;
      return t_count;
    end;
  end getTableCount;

  調用函數

  begin
    dbms_output.put_line(getTableCount(‘t_book‘));
  end;

2、預存程序

  create or replace procedure addbook(bookName in varchar2,bookTypeId in number,n1 out number) as
  begin
    declare maxId number;
    n number;
    begin
      select count(*) into n from t_book where name1=bookName;

      select count(*) into n1 from t_book;
      if n>0 then
        return;
      end if;
      select max(id) into maxId from t_book;
      insert into t_book values(maxId+1,bookName,bookTypeId);
      commit;
    end;
  end addbook;

  調用  

    set serveroutput on;
    declare num1 number;
    begin
      addbook(‘java11‘,1,num1);
      dbms_output.put_line(num1);
    end;

 

oracle函數及預存程序

聯繫我們

該頁面正文內容均來源於網絡整理,並不代表阿里雲官方的觀點,該頁面所提到的產品和服務也與阿里云無關,如果該頁面內容對您造成了困擾,歡迎寫郵件給我們,收到郵件我們將在5個工作日內處理。

如果您發現本社區中有涉嫌抄襲的內容,歡迎發送郵件至: info-contact@alibabacloud.com 進行舉報並提供相關證據,工作人員會在 5 個工作天內聯絡您,一經查實,本站將立刻刪除涉嫌侵權內容。

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.