Note
This view is available starting with V3.2.1.
Purpose
ALL_PART_COL_STATISTICS displays the column statistics and histogram information of partitions in the partitioned tables that are accessible to the current user.
Applicability
This view is available only in Oracle mode.
Columns
Column |
Type |
Nullable |
Description |
|---|---|---|---|
| OWNER | VARCHAR2(128) | NO | The user to which the column belongs. |
| TABLE_NAME | VARCHAR2(128) | NO | The name of the table. |
| PARTITION_NAME | VARCHAR2(128) | NO | The name of the partition. |
| COLUMN_NAME | VARCHAR2(128) | NO | The name of the column. |
| NUM_DISTINCT | NUMBER | YES | The number of distinct values in the column. |
| LOW_VALUE | VARCHAR2(128) | YES | The minimum value of the column. |
| HIGH_VALUE | VARCHAR2(128) | YES | The maximum value of the column. |
| DENSITY | NUMBER | YES | The density of the column. |
| NUM_NULLS | NUMBER | YES | The number of NULL values in the column. |
| NUM_BUCKETS | NUMBER | YES | The number of buckets in the histogram of the column. |
| SAMPLE_SIZE | NUMBER | YES | The sample size used for analysis. |
| LAST_ANALYZED | DATE | YES | The time when the last analysis was performed. |
| GLOBAL_STATS | VARCHAR2(3) | YES |
|
| USER_STATS | VARCHAR2(3) | YES | Indicates whether the partition statistics were set by the user. |
| NOTES | VARCHAR2(80) | YES | Records some additional attributes. |
| AVG_COL_LEN | NUMBER | YES | The average length of the column. |
| HISTOGRAM | VARCHAR2(15) | YES | The type of the histogram. |
Sample query
Query the column statistics and histogram information of partitions in the partitioned table T_SUBPART that are accessible to the current user.
obclient [SYS]> SELECT * FROM SYS.ALL_PART_COL_STATISTICS WHERE TABLE_NAME='T_SUBPART';
The query result is as follows:
+-------+------------+----------------+-------------+--------------+-----------+------------+-----------------------+-----------+-------------+-------------+---------------+--------------+------------+-------+-------------+-----------+
| OWNER | TABLE_NAME | PARTITION_NAME | COLUMN_NAME | NUM_DISTINCT | LOW_VALUE | HIGH_VALUE | DENSITY | NUM_NULLS | NUM_BUCKETS | SAMPLE_SIZE | LAST_ANALYZED | GLOBAL_STATS | USER_STATS | NOTES | AVG_COL_LEN | HISTOGRAM |
+-------+------------+----------------+-------------+--------------+-----------+------------+-----------------------+-----------+-------------+-------------+---------------+--------------+------------+-------+-------------+-----------+
| SYS | T_SUBPART | P2 | C1 | 2658 | 3 | 9995 | .00037622272385252068 | 0 | 5 | 2504 | 17-MAR-25 | NO | NO | NULL | 20 | HYBRID |
| SYS | T_SUBPART | P1 | C1 | 4986 | 0 | 9999 | .00020056157240272763 | 0 | 5 | 4966 | 17-MAR-25 | NO | NO | NULL | 20 | HYBRID |
| SYS | T_SUBPART | P0 | C1 | 2646 | 2 | 9998 | .0003779289493575208 | 0 | 5 | 2530 | 17-MAR-25 | NO | NO | NULL | 20 | HYBRID |
| SYS | T_SUBPART | P2 | C2 | 965 | 1 | 999 | .0010362694300518134 | 0 | 5 | 2504 | 17-MAR-25 | NO | NO | NULL | 20 | HYBRID |
| SYS | T_SUBPART | P1 | C2 | 1031 | 0 | 999 | .00096993210475266732 | 0 | 5 | 4966 | 17-MAR-25 | NO | NO | NULL | 20 | HYBRID |
| SYS | T_SUBPART | P0 | C2 | 975 | 0 | 999 | .0010256410256410256 | 0 | 5 | 2530 | 17-MAR-25 | NO | NO | NULL | 20 | HYBRID |
| SYS | T_SUBPART | P2 | C3 | 1498 | 1 | 1999 | .00066755674232309744 | 0 | 5 | 2504 | 17-MAR-25 | NO | NO | NULL | 20 | HYBRID |
| SYS | T_SUBPART | P1 | C3 | 1933 | 0 | 1999 | .00051733057423693739 | 0 | 5 | 4966 | 17-MAR-25 | NO | NO | NULL | 20 | HYBRID |
| SYS | T_SUBPART | P0 | C3 | 1529 | 0 | 1999 | .00065402223675604975 | 0 | 5 | 2530 | 17-MAR-25 | NO | NO | NULL | 20 | HYBRID |
+-------+------------+----------------+-------------+--------------+-----------+------------+-----------------------+-----------+-------------+-------------+---------------+--------------+------------+-------+-------------+-----------+
9 rows in set
References
To query the column statistics of partitions in all partitioned tables in the current tenant, see DBA_PART_COL_STATISTICS.
To query the column statistics of partitions in all partitioned tables in the current user schema, see USER_PART_COL_STATISTICS.
To query the column statistics of tables, query the following views:
To query the column statistics of global indexes, query the following views:
To query the column statistics of subpartitions, query the following views:
To query the histogram statistics of tables, query the following views:
To query the histogram statistics of partitions, query the following views:
To query the histogram statistics of subpartitions, query the following views:
To query the statistics of indexes, query the following views:
For information about how to collect statistics, see the following topics: