可根据表的多少,来写exp语句
select max(sys_connect_by_path(table_name, ',')) tablelist
from (select table_name,
ceil(sum(num_rows) over(order by table_name asc) / 20000000) s1,
rank() over(order by table_name asc) rk
from user_tables)
connect by rk = prior rk - 1
and s1 = prior s1
group by s1
connet by用法一则
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转载自aigo-h.iteye.com/blog/1936446
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