--- title: github-fill description: oceanbase.DBA_SUBPART_COL_STATISTICS 说明 该视图从 V4.0.0 版本开始引入。 功能描述 展示本租户所有子分区表的列统计信息和直方图信息。 字段说明 字段名称 类型 是否可以为 NULL 描述 OWNER varchar(128) NO 分区表的所有者 TABLE_NAME v… --- 切换语言 - 中文站 - 简体中文 - International - English - 日本站 - 日本語 文档反馈![](https://mdn.alipayobjects.com/huamei_22khvb/afts/img/A*P8CuR4UJ_FkAAAAAAAAAAAAADiGDAQ/original) OceanBase 数据库分布式版 - V 4.5.0 # oceanbase.DBA_SUBPART_COL_STATISTICS 更新时间：2026-04-01 14:27:05 [编辑](https://github.com/oceanbase/oceanbase-doc/edit/V4.5.0/zh-CN/700.reference/700.system-views/300.system-view-of-sys-tenant/200.dictionary-view-of-sys-tenant/25900.o-dba_subpart_col_statistics-of-sys-tenant.md) #### 说明 该视图从 V4.0.0 版本开始引入。 ## 功能描述 展示本租户所有子分区表的列统计信息和直方图信息。 ## 字段说明 | 字段名称 | 类型 | 是否可以为 NULL | 描述 | | --- | --- | --- | --- | | OWNER | varchar(128) | NO | 分区表的所有者 | | TABLE_NAME | varchar(128) | NO | 表名 | | SUBPARTITION_NAME | varchar(128) | NO | 子分区表名称 | | COLUMN_NAME | varchar(128) | NO | 列名 | | NUM_DISTINCT | decimal(10,0) | NO | 列中不同值的数量 | | LOW_VALUE | varchar(128) | NO | 列的最小值 | | HIGH_VALUE | varchar(128) | NO | 列的最大值 | | DENSITY | decimal(10,0) | NO | 列的密度。如果直方图在 COLUMN_NAME 上可用，则此列显示跨越直方图中少于 2 个端点的值的选择性。它不代表跨越 2 个或更多端点的值的选择性。如果直方图在 COLUMN_NAME 上不可用，则此列的值为 1/ NUM_DISTINCT | | NUM_NULLS | decimal(10,0) | NO | 列中的 NULL 数 | | NUM_BUCKETS | decimal(10,0) | NO | 列的直方图中的桶数 | | LAST_ANALYZED | datetime(6) | NO | 最近分析色谱柱的日期 | | SAMPLE_SIZE | decimal(10,0) | NO | 用于分析色谱柱的样本量 | | GLOBAL_STATS | varchar(3) | NO | 指示统计信息是否已收集： - YES - NO | | USER_STATS | varchar(3) | NO | 指示统计信息是否由用户直接输入： - YES - NO | | NOTES | varchar(80) | NO | 描述统计信息的一些附加属性。例如：如果值为 INCREMENTAL，则全局统计信息来自概要，即：全局统计信息是增量维护的 | | AVG_COL_LEN | decimal(10,0) | NO | 列的平均长度（以字节为单位） | | HISTOGRAM | varchar(15) | NO | 指示直方图的类型： - NONE - FREQUENCY - HEIGHT BALANCED - HYBRID - TOP-FREQUENCY | ## 查询示例 查看本租户的分区表 `t_subpart` 的二级分区的列统计信息。 ```shell obclient [oceanbase]> SELECT * FROM oceanbase.DBA_SUBPART_COL_STATISTICS WHERE TABLE_NAME='t_subpart'; ``` 查询结果如下： ```shell +-------+------------+-------------------+-------------+--------------+-----------+------------+--------------+-----------+-------------+----------------------------+-------------+--------------+------------+-------+-------------+-----------+ | OWNER | TABLE_NAME | SUBPARTITION_NAME | COLUMN_NAME | NUM_DISTINCT | LOW_VALUE | HIGH_VALUE | DENSITY | NUM_NULLS | NUM_BUCKETS | LAST_ANALYZED | SAMPLE_SIZE | GLOBAL_STATS | USER_STATS | NOTES | AVG_COL_LEN | HISTOGRAM | +-------+------------+-------------------+-------------+--------------+-----------+------------+--------------+-----------+-------------+----------------------------+-------------+--------------+------------+-------+-------------+-----------+ | test | t_subpart | p0ssp0 | c1 | 1313 | 0 | 9999 | 0.0007616146 | 0 | 5 | 2025-03-17 15:30:30.152256 | 1336 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p0ssp0 | c2 | 332 | 0 | 999 | 0.0030120482 | 0 | 5 | 2025-03-17 15:30:30.152256 | 1336 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p0ssp0 | c3 | 630 | 0 | 1999 | 0.0015873016 | 0 | 5 | 2025-03-17 15:30:30.152256 | 1336 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p0ssp1 | c1 | 1001 | 2001 | 8997 | 0.0009990010 | 0 | 5 | 2025-03-17 15:30:30.152256 | 999 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p0ssp1 | c2 | 349 | 1 | 997 | 0.0028653295 | 0 | 5 | 2025-03-17 15:30:30.152256 | 999 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p0ssp1 | c3 | 691 | 1 | 1997 | 0.0014471780 | 0 | 5 | 2025-03-17 15:30:30.152256 | 999 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p0ssp2 | c1 | 996 | 1002 | 7998 | 0.0010040161 | 0 | 5 | 2025-03-17 15:30:30.152256 | 999 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p0ssp2 | c2 | 338 | 2 | 998 | 0.0029585799 | 0 | 5 | 2025-03-17 15:30:30.152256 | 999 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p0ssp2 | c3 | 678 | 2 | 1998 | 0.0014749263 | 0 | 5 | 2025-03-17 15:30:30.152256 | 999 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p1ssp0 | c1 | 1025 | 1000 | 7999 | 0.0009756098 | 0 | 5 | 2025-03-17 15:30:30.152256 | 1002 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p1ssp0 | c2 | 332 | 0 | 999 | 0.0030120482 | 0 | 5 | 2025-03-17 15:30:30.152256 | 1002 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p1ssp0 | c3 | 630 | 0 | 1999 | 0.0015873016 | 0 | 5 | 2025-03-17 15:30:30.152256 | 1002 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p1ssp1 | c1 | 1357 | 1 | 9997 | 0.0007369197 | 0 | 5 | 2025-03-17 15:30:30.152256 | 1332 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p1ssp1 | c2 | 349 | 1 | 997 | 0.0028653295 | 0 | 5 | 2025-03-17 15:30:30.152256 | 1332 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p1ssp1 | c3 | 691 | 1 | 1997 | 0.0014471780 | 0 | 5 | 2025-03-17 15:30:30.152256 | 1332 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p1ssp2 | c1 | 965 | 2002 | 8998 | 0.0010362694 | 0 | 5 | 2025-03-17 15:30:30.152256 | 999 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p1ssp2 | c2 | 338 | 2 | 998 | 0.0029585799 | 0 | 5 | 2025-03-17 15:30:30.152256 | 999 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p1ssp2 | c3 | 678 | 2 | 1998 | 0.0014749263 | 0 | 5 | 2025-03-17 15:30:30.152256 | 999 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p2ssp0 | c1 | 1007 | 2000 | 8999 | 0.0009930487 | 0 | 5 | 2025-03-17 15:30:30.152256 | 1002 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p2ssp0 | c2 | 332 | 0 | 999 | 0.0030120482 | 0 | 5 | 2025-03-17 15:30:30.152256 | 1002 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p2ssp0 | c3 | 630 | 0 | 1999 | 0.0015873016 | 0 | 5 | 2025-03-17 15:30:30.152256 | 1002 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p2ssp1 | c1 | 1047 | 1001 | 7997 | 0.0009551098 | 0 | 5 | 2025-03-17 15:30:30.152256 | 999 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p2ssp1 | c2 | 349 | 1 | 997 | 0.0028653295 | 0 | 5 | 2025-03-17 15:30:30.152256 | 999 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p2ssp1 | c3 | 691 | 1 | 1997 | 0.0014471780 | 0 | 5 | 2025-03-17 15:30:30.152256 | 999 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p2ssp2 | c1 | 1298 | 2 | 9998 | 0.0007704160 | 0 | 5 | 2025-03-17 15:30:30.152256 | 1332 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p2ssp2 | c2 | 338 | 2 | 998 | 0.0029585799 | 0 | 5 | 2025-03-17 15:30:30.152256 | 1332 | NO | NO | NULL | 20 | HYBRID | | test | t_subpart | p2ssp2 | c3 | 678 | 2 | 1998 | 0.0014749263 | 0 | 5 | 2025-03-17 15:30:30.152256 | 1332 | NO | NO | NULL | 20 | HYBRID | +-------+------------+-------------------+-------------+--------------+-----------+------------+--------------+-----------+-------------+----------------------------+-------------+--------------+------------+-------+-------------+-----------+ 27 rows in set ``` ## 相关视图或文档 - 查看表级的列统计信息：[DBA_TAB_STATISTICS](https://www.oceanbase.com/docs/common-oceanbase-database-cn-1000000004477519) - 查看 Global 级的列统计信息：[DBA_TAB_COL_STATISTICS](https://www.oceanbase.com/docs/common-oceanbase-database-cn-1000000004477446) - 查看 Partition 级的列统计信息：[DBA_PART_COL_STATISTICS](https://www.oceanbase.com/docs/common-oceanbase-database-cn-1000000004477750) - 查看表级的直方图统计信息：[DBA_TAB_HISTOGRAMS](https://www.oceanbase.com/docs/common-oceanbase-database-cn-1000000004477512) - 查看 Partition 级的直方图统计信息：[DBA_PART_HISTOGRAMS](https://www.oceanbase.com/docs/common-oceanbase-database-cn-1000000004477479) - 查看 Subpartition 级的直方图统计信息：[DBA_SUBPART_HISTOGRAMS](https://www.oceanbase.com/docs/common-oceanbase-database-cn-1000000004477651) - 查看索引统计信息：[DBA_IND_STATISTICS](https://www.oceanbase.com/docs/common-oceanbase-database-cn-1000000004477487) - 有关如何收集统计信息，参见以下文档： - [手动收集统计信息](https://www.oceanbase.com/docs/common-oceanbase-database-cn-1000000004481059) - [自动收集统计信息](https://www.oceanbase.com/docs/common-oceanbase-database-cn-1000000004481061) 上一篇 下一篇 ![有帮助](https://gw.alipayobjects.com/mdn/ob_asset/afts/img/A*y6ocSqN8cqsAAAAAAAAAAAAAARQnAQ)![无帮助](https://gw.alipayobjects.com/mdn/ob_asset/afts/img/A*BG9IQJyLHF8AAAAAAAAAAAAAARQnAQ)![反馈](https://gw.alipayobjects.com/mdn/ob_asset/afts/img/A*eTWdQKCRKHwAAAAAAAAAAAAAARQnAQ)[AI](https://www.oceanbase.com/obi) 咨询热线