Home >Database >Mysql Tutorial >Oracle的动态SQL和动态游标举例

Oracle的动态SQL和动态游标举例

WBOY
WBOYOriginal
2016-06-07 17:12:471224browse

--动态sql和动态游标 declare cnt number; begin execute immediate

--动态sql和动态游标
declare
  cnt number; 
begin
  execute immediate
  'select count(*) from emp'
  into cnt;
  dbms_output.put_line(cnt);
end;

--创建存储过程执行插入语句
create or replace procedure myproc11
(empid in varchar2,empname in varchar2)
is
  sql_str varchar(200):='insert into emp values(:a,:b)';    
begin
  execute immediate sql_str using empid,empname;
  commit;
end;


--本过程有两个参数,第一个表示查询类型:0-精确查询 1-模糊查询;
--第二个参数表示查询条件
create or replace procedure myproc12
(query_type in number,empname in varchar2)
is
  sql_str varchar(200):='select * from emp ';
  cur pck1.myrefcur;
  e emp%rowtype;   
begin
 
  if query_type=0 then
    sql_str:=sql_str||'where emp_name=:1';
  else
     sql_str:=sql_str||'where emp_name like ''%''||:1||''%''';
  end if;
  dbms_output.put_line(sql_str);
  open cur for sql_str using empname;
 
  loop
   fetch cur into e;
   exit when cur%notfound;
   dbms_output.put_line(e.emp_id||','||e.emp_name);
  end loop;
  close cur;
end;

--按姓名模糊查询记录总数
create or replace procedure myproc20
(ename in varchar2)
is
  cnt number; 
begin
  execute immediate
  'select count(*) from emp where emp_name like ''%''||:n||''%'''
  into cnt using ename;
 
  dbms_output.put_line(cnt);
end;

更多Oracle相关信息见Oracle 专题页面 ?tid=12       

linux

Statement:
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn