Oracle 12c - 如何查看某个表的所有分区和子分区以及每个表的记录数

Question

I got to explore table 't1'.

How to see:

• All partitions and which column is being used for partitions
• All sub-partitions and which column is being used for sub-partitions
• Number of records for each partition and number of record for each sub-partition

This gives a good start but need more info (above):

select * from ALL_PART_TABLES where table_name = 't1'

Thanks.

Answer 1

The below query gives the number of rows in SUBPARTITION

select num_rows, PARTITION_NAME , SUBPARTITION_NAME 
  FROM ALL_TAB_SUBPARTITIONS
where table_name = 'yourtable';

The below query gives the number of rows in PARTITION and also the number of sub partitions.

select num_rows, PARTITION_NAME, SUBPARTITION_COUNT     
  FROM ALL_TAB_SUBPARTITIONS
where table_name = 'yourtable';