oracle 循环插入数据

　　参考链接：oracle 行转列 pivot函数基本用法

--建表
--drop table SalesList;
create table SalesList(
    keHu                varchar2(20),   --客户
    shangPin            varchar2(20),   --商品名称
    salesNum            number(8)       --销售数量
);

--插入数据
declare
  --谈几个客户
  cursor lr_kh is
  select regexp_substr('张三、李四、王五、赵六','[^、]+',1, level) keHu from dual
   connect by level <= 4;
  --进点货
  cursor lr_sp is
  select regexp_substr('上衣、裤子、袜子、帽子','[^、]+',1, level) shangPin from dual
   connect by level <= 4;
begin
  --循环插入
  for v_kh in lr_kh loop
     for v_sp in lr_sp loop
        insert into SalesList
        select v_kh.keHu, v_sp.shangPin, floor(dbms_random.value(10,50)) from dual;
     end loop;
  end loop;
  commit;
end;
/

　　优化

SELECT
    REGEXP_SUBSTR('17,20,23', '[^,]+', 1, LEVEL, 'i') AS STR
FROM
    DUAL
CONNECT BY
    LEVEL <= LENGTH('17,20,23') - LENGTH(REGEXP_REPLACE('17,20,23', ',', ''))+1;