Oracle ->> 生成测试数据

declare v_exists_table number;
begin
  select count(*) into v_exists_table from all_tables where table_name = 'NUMBERS';
  if v_exists_table <> 0 then
    execute immediate 'drop table NUMBERS';
  end if;
end;
/
 
create table Numbers(
ID NUMBER
  CONSTRAINT cons_Numbers_ID_uni_nn NOT NULL UNIQUE,
GRP_FACTOR NUMBER
  CONSTRAINT cons_Numbers_ID_nn NOT NULL
);
/
 
INSERT INTO Numbers(ID, GRP_FACTOR)
with tmp as (
select col1 from (
select 1 as col1 from all_objects order by OBJECT_ID) a
where ROWNUM <= 12
order by ROWNUM ASC),
 
tmp2 as (
select col1 from (
select 1 as col1 from all_objects, tmp order by OBJECT_ID) a
where ROWNUM <= 100000
order by ROWNUM ASC)
 
select rn, grp_factor from (
select ROW_NUMBER() OVER(ORDER BY sys_guid()) AS rn, ntile(10) over (order by sys_guid()) as grp_factor
from tmp2) t order by rn;

又是一个蛋疼的区别。Oracle下把WITH AS语句和INSERT INTO结合起来需要把INSERT INTO放在WITH AS前面，而SQL SERVER下是放在WITH AS后面那条SELECT语句的前面。