1. Database Reference
  2. Static Data Dictionary Views
  3. Static Data Dictionary Views: ALL_PART_COL_STATISTICS to DATABASE_PROPERTIES
  4. ALL_SUBPART_COL_STATISTICS

3.98 ALL_SUBPART_COL_STATISTICS

ALL_SUBPART_COL_STATISTICS describes column statistics and histogram information for subpartitions of partitioned objects accessible to the current user.

Related Views

  • DBA_SUBPART_COL_STATISTICS provides this information for all subpartitions in the database.

  • USER_SUBPART_COL_STATISTICS provides this information for subpartitions of all partitioned objects owned by the current user. This view does not display the OWNER column.

Column Datatype NULL Description

OWNER

VARCHAR2(128)

NOT NULL

Owner of the table

TABLE_NAME

VARCHAR2(128)

NOT NULL

Name of the table

SUBPARTITION_NAME

VARCHAR2(128)

Table subpartition name

COLUMN_NAME

VARCHAR2(4000)

Column name

NUM_DISTINCT

NUMBER

Number of distinct values in the column

LOW_VALUE

RAW(1000)

Low value in the column

HIGH_VALUE

RAW(1000)

High value in the column

DENSITY

NUMBER

If a histogram is available on COLUMN_NAME, then this column displays the selectivity of a value that spans fewer than 2 endpoints in the histogram. It does not represent the selectivity of values that span 2 or more endpoints.

If a histogram is not available on COLUMN_NAME, then the value of this column is 1/NUM_DISTINCT.

NUM_NULLS

NUMBER

Number of NULLs in the column

NUM_BUCKETS

NUMBER

Number of buckets in histogram for the column

SAMPLE_SIZE

NUMBER

Sample size used in analyzing this column

LAST_ANALYZED

DATE

Date on which this column was most recently analyzed

GLOBAL_STATS

VARCHAR2(3)

GLOBAL_STATS will be YES if statistics have been gathered or NO if statistics have not been gathered

USER_STATS

VARCHAR2(3)

Indicates whether statistics were entered directly by the user (YES) or not (NO)

NOTES

VARCHAR2(41)

Describes some additional properties of the statistics. For example, if the value is INCREMENTAL, the global statistics are derived from synopses, that is, the global statistics are incrementally maintained.

AVG_COL_LEN

NUMBER

Average length of the column (in bytes)

HISTOGRAM

VARCHAR2(15)

Indicates existence/type of histogram:

  • NONE

  • FREQUENCY

  • HEIGHT BALANCED

  • HYBRID

  • TOP-FREQUENCY

See Also: