oracle 并行执行sql

并行执行执行sql

alter session enable parallel dml;
update  /*+ parallel(t,100)*/  People t set t.handle_flag='0' where t.handle_flag is null ;
commit;
alter session disable parallel dml

如果数据量大

用存储过程执行 加游标执行

create or replace procedure myprocedure is
      CURSOR CUR_TEST IS --声明显式游标
             SELECT ECODE,ENAME
              FROM EMP;
      CUR CUR_TEST%ROWTYPE; --定义游标变量，该变量的类型为基于游标C_EMP的记录
     
    BEGIN 
      --For 循环
      FOR CUR IN CUR_TEST LOOP
          --循环体
        DBMS_OUTPUT.PUT_LINE('员工编号：'||CUR.ECODE ||'员工姓名：'|| CUR.ENAME);
        END LOOP;
        
END myprocedure; 
     
      

用游标 1万执行一次

DECLARE
  CURSOR UPDATE_CURSOR1 IS
  select id from user1.table1;
  T_ROW1 UPDATE_CURSOR1%ROWTYPE;
  row_num1     int := 0;
BEGIN
  OPEN UPDATE_CURSOR1;
  LOOP
  FETCH UPDATE_CURSOR1  INTO T_ROW1;
  EXIT WHEN UPDATE_CURSOR1%NOTFOUND;
  update user1.table1
  set x='0'
  where id=t_row1.id;
  row_num1:=row_num1 + 1;
  if row_num1=10000 then
  commit;
  row_num1:= 0;
  end if;
  commit;
  END LOOP;
  CLOSE UPDATE_CURSOR1;
END;