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Oracle数据库的游标Cursor和存储过程 PL/SQL

Jun 07, 2016 pm 05:11 PM
oracle database

Oracle数据库的游标Cursor和存储过程 PL/SQL

Oracle数据库的游标和存储过程

spool abc.log                  --开始记录日志

create or replace procedure db.PROC_FIRST(FLAG OUT INTERGER,
     T_DATE IN VARCHAR2)

AS

  varno varchar2(20);
  varprice varchar2(20);

CURSOR mycur(vartype number) is
  select emp_no,emp_zc from cus_emp_basic
  where com_no = vartype;
 
BEGIN
  if NOT mycur%ISOPEN then
  open mycur(043925);
  end if;
  FETCH mycur INTO varno,varprice;
  WHILE mycur%FOUND
  LOOP

      dbms_output.put_line(varno||','||varprice);
      if mycur%rowcount=2 then
        EXIT;
     end if;
     fetch mycur into varno,varprice;
  END LOOP;
  CLOSE mycur;

 

  EXCEPTION   WHEN OTHERS THEN
ROLLBACK;

  end;

spool off

  记录并不保存在数据库中,它与变量一样,保存在内存空间中,在使用记录时候,要首先定义记录结构,,然后声明记录变量。可以把PL/SQL记录看作是一个用户自定义的数据类型。

EXECUTE IMMEDIATE sqlstr;

它解析并马上执行动态的SQL语句或非运行时创建的PL/SQL块.动态创建和执行SQL语句性能超前


PL/SQL的系统变量及CURSOR:

游标属性:
%ISOPEN
%FOUND
%NOTFOUND
%ROWCOUNT

异常:

SQLCODE() 错误号
SQLERRM() 错误信息
NO_DATA_FOUND

linux

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