create table computers ( comNo number(4) constraint PK_comp primary key, compModel varchar2(64) constraint unique_comp unique, buyTime date, price number(12,2) constraint ch_price check( price>0 and price<=300000), owner varchar2(32)); DECLARE i number := 0; BEGIN for i in 1 .. 3000 loop insert into computers (comNo, compModel, buyTime, price, owner) values (i, '8' + i, to_date('' + sysdate, 'YYYY-MM'), i, 'zhangsan'); --dbms_output.put_line(i); end loop; commit; END;