plsql循环的简单实例

declare
v_id tbl_regions.regions_id%type;
begin
for  v_i in .. loop
select t.regions_id into v_id from  tbl_regions t where t.regions_id=v_i;
dbms_output.put_line(v_id);
update tbl_regions s set s.regions_sort = v_id  where s.regions_id=v_i;
end loop;
end;

declare
v_i int:=;
v_j int:=;
begin

while v_i< loop
v_j:=;
while v_j<=v_i loop

dbms_output.put(v_j||'*'||v_i||'='||v_i*v_j||' ');
v_j:=v_j+;
end loop;
dbms_output.put_line('');
v_i:=v_i+;
end loop;
end;