用sql写出九九乘法表

效果图


sql语句如下：
with X as 
(select level as lv from dual connect by level <=9),
Y as
(select a.lv as lv_a,
  b.lv as lv_b,
  to_char(b.lv) || ' x ' || to_char(a.lv) || ' = ' || rpad(to_char(a.lv * b.lv),2,' ') as text
from X a,X b
where b.lv <= a.lv)
select listagg(Y.text,'  ') within group (order by Y.lv_b) as 九九乘法表 
from Y
group by Y.lv_a;

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