oracle查表技巧

查每张表中有多少条记录

SELECT table_name,num_rows FROM user_tables order by num_rows desc;

https://www.cnblogs.com/xzhg/p/6473011.html

查一张表中不同时间段分别有多少条记录：

select ttime, count(ttime) from VOLTE_GT_CELL_ANA_BASEDAY group by ttime;

select ttime,count(ttime) from VOLTE_GT_USER_ANA_BASEDAY t group by ttime;

待补充。。