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数据库中如何查看统计信息
小编给大家分享一下数据库中如何查看统计信息，相信大部分人都还不怎么了解，因此分享这篇文章给大家参考一下，希望大家阅读完这篇文章后大有收获，下面让我们一起去了解一下吧！
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set echo off
set scan on
set lines 150
set pages 66
set verify off
set feedback off
set termout off
column uservar new_value Table_Owner noprint
select user uservar from dual;
set termout on
column TABLE_NAME heading "Tables owned by &Table_Owner" format a30
select table_name from dba_tables where owner=upper('&Table_Owner') order by 1
/
undefine table_name
undefine owner
prompt
accept owner prompt 'Please enter Name of Table Owner (Null = &Table_Owner): '
accept table_name prompt 'Please enter Table Name to show Statistics for: '
column TABLE_NAME heading "Table|Name" format a15
column PARTITION_NAME heading "Partition|Name" format a15
column SUBPARTITION_NAME heading "SubPartition|Name" format a15
column NUM_ROWS heading "Number|of Rows" format 9,999,999,999,990
column BLOCKS heading "Blocks" format 999,990
column EMPTY_BLOCKS heading "Empty|Blocks" format 999,999,990
column AVG_SPACE heading "Average|Space" format 9,990
column CHAIN_CNT heading "Chain|Count" format 999,990
column AVG_ROW_LEN heading "Average|Row Len" format 990
column COLUMN_NAME heading "Column|Name" format a25
column NULLABLE heading Null|able format a4
column NUM_DISTINCT heading "Distinct|Values" format 999,999,990
column NUM_NULLS heading "Number|Nulls" format 9,999,990
column NUM_BUCKETS heading "Number|Buckets" format 990
column DENSITY heading "Density" format 990
column INDEX_NAME heading "Index|Name" format a15
column UNIQUENESS heading "Unique" format a9
column BLEV heading "B|Tree|Level" format 90
column LEAF_BLOCKS heading "Leaf|Blks" format 990
column DISTINCT_KEYS heading "Distinct|Keys" format 9,999,999,990
column AVG_LEAF_BLOCKS_PER_KEY heading "Average|Leaf Blocks|Per Key" format 99,990
column AVG_DATA_BLOCKS_PER_KEY heading "Average|Data Blocks|Per Key" format 99,990
column CLUSTERING_FACTOR heading "Cluster|Factor" format 999,999,990
column COLUMN_POSITION heading "Col|Pos" format 990
column col heading "Column|Details" format a24
column COLUMN_LENGTH heading "Col|Len" format 9,990
column GLOBAL_STATS heading "Global|Stats" format a6
column USER_STATS heading "User|Stats" format a6
column SAMPLE_SIZE heading "Sample|Size" format 9,999,999,999,990
column to_char(t.last_analyzed,'MM-DD-YYYY') heading "Date|MM-DD-YYYY" format a10
prompt
prompt ***********
prompt Table Level
prompt ***********
prompt
select
TABLE_NAME,
NUM_ROWS,
BLOCKS,
EMPTY_BLOCKS,
AVG_SPACE,
CHAIN_CNT,
AVG_ROW_LEN,
GLOBAL_STATS,
USER_STATS,
SAMPLE_SIZE,
to_char(t.last_analyzed,'MM-DD-YYYY')
from dba_tables t
where
owner = upper(nvl('&&Owner',user))
and table_name = upper('&&Table_name')
/
select
COLUMN_NAME,
decode(t.DATA_TYPE,
'NUMBER',t.DATA_TYPE||'('||
decode(t.DATA_PRECISION,
null,t.DATA_LENGTH||')',
t.DATA_PRECISION||','||t.DATA_SCALE||')'),
'DATE',t.DATA_TYPE,
'LONG',t.DATA_TYPE,
'LONG RAW',t.DATA_TYPE,
'ROWID',t.DATA_TYPE,
'MLSLABEL',t.DATA_TYPE,
t.DATA_TYPE||'('||t.DATA_LENGTH||')') ||' '||
decode(t.nullable,
'N','NOT NULL',
'n','NOT NULL',
NULL) col,
NUM_DISTINCT,
DENSITY,
NUM_BUCKETS,
NUM_NULLS,
GLOBAL_STATS,
USER_STATS,
SAMPLE_SIZE,
to_char(t.last_analyzed,'MM-DD-YYYY')
from dba_tab_columns t
where
table_name = upper('&Table_name')
and owner = upper(nvl('&Owner',user))
/
select
INDEX_NAME,
UNIQUENESS,
BLEVEL BLev,
LEAF_BLOCKS,
DISTINCT_KEYS,
NUM_ROWS,
AVG_LEAF_BLOCKS_PER_KEY,
AVG_DATA_BLOCKS_PER_KEY,
CLUSTERING_FACTOR,
GLOBAL_STATS,
USER_STATS,
SAMPLE_SIZE,
to_char(t.last_analyzed,'MM-DD-YYYY')
from
dba_indexes t
where
table_name = upper('&Table_name')
and table_owner = upper(nvl('&Owner',user))
/
break on index_name
select
i.INDEX_NAME,
i.COLUMN_NAME,
i.COLUMN_POSITION,
decode(t.DATA_TYPE,
'NUMBER',t.DATA_TYPE||'('||
decode(t.DATA_PRECISION,
null,t.DATA_LENGTH||')',
t.DATA_PRECISION||','||t.DATA_SCALE||')'),
'DATE',t.DATA_TYPE,
'LONG',t.DATA_TYPE,
'LONG RAW',t.DATA_TYPE,
'ROWID',t.DATA_TYPE,
'MLSLABEL',t.DATA_TYPE,
t.DATA_TYPE||'('||t.DATA_LENGTH||')') ||' '||
decode(t.nullable,
'N','NOT NULL',
'n','NOT NULL',
NULL) col
from
dba_ind_columns i,
dba_tab_columns t
where
i.table_name = upper('&Table_name')
and owner = upper(nvl('&Owner',user))
and i.table_name = t.table_name
and i.column_name = t.column_name
order by index_name,column_position
/
prompt
prompt ***************
prompt Partition Level
prompt ***************
select
PARTITION_NAME,
NUM_ROWS,
BLOCKS,
EMPTY_BLOCKS,
AVG_SPACE,
CHAIN_CNT,
AVG_ROW_LEN,
GLOBAL_STATS,
USER_STATS,
SAMPLE_SIZE,
to_char(t.last_analyzed,'MM-DD-YYYY')
from
dba_tab_partitions t
where
table_owner = upper(nvl('&&Owner',user))
and table_name = upper('&&Table_name')
order by partition_position
/
break on partition_name
select
PARTITION_NAME,
COLUMN_NAME,
NUM_DISTINCT,
DENSITY,
NUM_BUCKETS,
NUM_NULLS,
GLOBAL_STATS,
USER_STATS,
SAMPLE_SIZE,
to_char(t.last_analyzed,'MM-DD-YYYY')
from
dba_PART_COL_STATISTICS t
where
table_name = upper('&Table_name')
and owner = upper(nvl('&Owner',user))
/
break on partition_name
select
t.INDEX_NAME,
t.PARTITION_NAME,
t.BLEVEL BLev,
t.LEAF_BLOCKS,
t.DISTINCT_KEYS,
t.NUM_ROWS,
t.AVG_LEAF_BLOCKS_PER_KEY,
t.AVG_DATA_BLOCKS_PER_KEY,
t.CLUSTERING_FACTOR,
t.GLOBAL_STATS,
t.USER_STATS,
t.SAMPLE_SIZE,
to_char(t.last_analyzed,'MM-DD-YYYY')
from
dba_ind_partitions t,
dba_indexes i
where
i.table_name = upper('&Table_name')
and i.table_owner = upper(nvl('&Owner',user))
and i.owner = t.index_owner
and i.index_name=t.index_name
/
prompt
prompt ***************
prompt SubPartition Level
prompt ***************
select
PARTITION_NAME,
SUBPARTITION_NAME,
NUM_ROWS,
BLOCKS,
EMPTY_BLOCKS,
AVG_SPACE,
CHAIN_CNT,
AVG_ROW_LEN,
GLOBAL_STATS,
USER_STATS,
SAMPLE_SIZE,
to_char(t.last_analyzed,'MM-DD-YYYY')
from
dba_tab_subpartitions t
where
table_owner = upper(nvl('&&Owner',user))
and table_name = upper('&&Table_name')
order by SUBPARTITION_POSITION
/
break on partition_name
select
p.PARTITION_NAME,
t.SUBPARTITION_NAME,
t.COLUMN_NAME,
t.NUM_DISTINCT,
t.DENSITY,
t.NUM_BUCKETS,
t.NUM_NULLS,
t.GLOBAL_STATS,
t.USER_STATS,
t.SAMPLE_SIZE,
to_char(t.last_analyzed,'MM-DD-YYYY')
from
dba_SUBPART_COL_STATISTICS t,
dba_tab_subpartitions p
where
t.table_name = upper('&Table_name')
and t.owner = upper(nvl('&Owner',user))
and t.subpartition_name = p.subpartition_name
and t.owner = p.table_owner
and t.table_name=p.table_name
/
break on partition_name
select
t.INDEX_NAME,
t.PARTITION_NAME,
t.SUBPARTITION_NAME,
t.BLEVEL BLev,
t.LEAF_BLOCKS,
t.DISTINCT_KEYS,
t.NUM_ROWS,
t.AVG_LEAF_BLOCKS_PER_KEY,
t.AVG_DATA_BLOCKS_PER_KEY,
t.CLUSTERING_FACTOR,
t.GLOBAL_STATS,
t.USER_STATS,
t.SAMPLE_SIZE,
to_char(t.last_analyzed,'MM-DD-YYYY')
from
dba_ind_subpartitions t,
dba_indexes i
where
i.table_name = upper('&Table_name')
and i.table_owner = upper(nvl('&Owner',user))
and i.owner = t.index_owner
and i.index_name=t.index_name
/
clear breaks
set echo on
*********** Table Level *********** Table Number Empty Average Chain Average Global User Sample Date Name of Rows Blocks Blocks Space Count Row Len Stats Stats Size MM-DD-YYYY --------------- ---------- -------- -------- ------- ----- ------- ------ ------ ---------- ---------- T1 5,000 20 0 0 0 9 YES NO 5,000 06-30-2003 Column Column Distinct Number Global User Sample Date Name Details Values Density Buckets NUM_NULLS Stats Stats Size MM-DD-YYYY ------------------------- ------------------------ -------- ------- ------- ---------- ------ ------ ---------- ---------- T1C1 NUMBER(22) 5,000 0 1 0 YES NO 5,000 06-30-2003 T1C2 NUMBER(22) 7 0 1 0 YES NO 5,000 06-30-2003 T1C3 NUMBER(22) 8 0 1 0 YES NO 5,000 06-30-2003 B Average Average Index Tree Leaf Distinct Number Leaf Blocks Data Blocks Cluster Global User Sample Date Name Unique Level Blks Keys of Rows Per Key Per Key Factor Stats Stats Size MM-DD-YYYY --------------- --------- ----- ---- ---------- ---------- ----------- ----------- -------- ------ ------ ---------- ---------- UN_T1 NONUNIQUE 1 12 5,000 5,000 1 1 12 YES NO 5,000 06-30-2003 Index Column Col Column Name Name Pos Details --------------- ------------------------- ---- ------------------------ UN_T1 T1C1 1 NUMBER(22) *************** Partition Level *************** Partition Number Empty Average Chain Average Global User Sample Date Name of Rows Blocks Blocks Space Count Row Len Stats Stats Size MM-DD-YYYY --------------- ---------- -------- -------- ------- ----- ------- ------ ------ ---------- ---------- Q1 2,144 10 0 0 0 9 YES NO 2,144 06-30-2003 Q2 2,856 10 0 0 0 9 YES NO 2,856 06-30-2003 Partition Column Distinct Number Global User Sample Date Name Name Values Density Buckets NUM_NULLS Stats Stats Size MM-DD-YYYY --------------- ------------------------- -------- ------- ------- ---------- ------ ------ ---------- ---------- Q1 T1C1 2,144 0 1 0 YES NO 2,144 06-30-2003 T1C2 3 0 1 0 YES NO 2,144 06-30-2003 T1C3 8 0 1 0 YES NO 2,144 06-30-2003 Q2 T1C1 2,856 0 1 0 YES NO 2,856 06-30-2003 T1C2 4 0 1 0 YES NO 2,856 06-30-2003 T1C3 8 0 1 0 YES NO 2,856 06-30-2003 B Average Average Index Partition Tree Leaf Distinct Number Leaf Blocks Data Blocks Cluster Global User Sample Date Name Name Level Blks Keys of Rows Per Key Per Key Factor Stats Stats Size MM-DD-YYYY --------------- --------------- ----- ---- ---------- ---------- ----------- ----------- -------- ------ ------ ---------- ---------- UN_T1 Q1 1 12 5,000 5,000 1 1 12 YES NO 5,000 06-30-2003 UN_T1 Q2 1 12 5,000 5,000 1 1 12 YES NO 5,000 06-30-2003 *************** SubPartition Level *************** Partition SubPartition Number Empty Average Chain Average Global User Sample Date Name Name of Rows Blocks Blocks Space Count Row Len Stats Stats Size MM-DD-YYYY --------------- --------------- ---------- -------- -------- ------- ----- ------- ------ ------ ---------- ---------- Q1 SYS_SUBP497 803 5 0 0 0 9 YES NO 803 06-30-2003 Q2 SYS_SUBP499 1,072 5 0 0 0 9 YES NO 1,072 06-30-2003 Q1 SYS_SUBP498 1,341 5 0 0 0 9 YES NO 1,341 06-30-2003 Q2 SYS_SUBP500 1,784 5 0 0 0 9 YES NO 1,784 06-30-2003 Partition SubPartition Column Distinct Number Global User Sample Date Name Name Name Values Density Buckets NUM_NULLS Stats Stats Size MM-DD-YYYY --------------- --------------- ------------------------- -------- ------- ------- ---------- ------ ------ ---------- ---------- Q1 SYS_SUBP497 T1C1 803 0 1 0 YES NO 803 06-30-2003 SYS_SUBP498 T1C1 1,341 0 1 0 YES NO 1,341 06-30-2003 SYS_SUBP497 T1C2 3 0 1 0 YES NO 803 06-30-2003 SYS_SUBP498 T1C2 3 0 1 0 YES NO 1,341 06-30-2003 SYS_SUBP497 T1C3 3 0 1 0 YES NO 803 06-30-2003 SYS_SUBP498 T1C3 5 0 1 0 YES NO 1,341 06-30-2003 Q2 SYS_SUBP499 T1C1 1,072 0 1 0 YES NO 1,072 06-30-2003 SYS_SUBP500 T1C1 1,784 0 1 0 YES NO 1,784 06-30-2003 SYS_SUBP499 T1C2 4 0 1 0 YES NO 1,072 06-30-2003 SYS_SUBP500 T1C2 4 0 1 0 YES NO 1,784 06-30-2003 SYS_SUBP499 T1C3 3 0 1 0 YES NO 1,072 06-30-2003 SYS_SUBP500 T1C3 5 0 1 0 YES NO 1,784 06-30-2003 B Average Average Index Partition SubPartition Tree Leaf Distinct Number Leaf Blocks Data Blocks Cluster Global User Sample Date Name Name Name Level Blks Keys of Rows Per Key Per Key Factor Stats Stats Size MM-DD-YYY --------------- --------------- --------------- ----- ---- ---------- ---------- ----------- ----------- -------- ------ ------ ---------- --------- UN_T1 Q1 SYS_SUBP497 1 2 803 803 1 1 2 YES NO 803 06-30-200 UN_T1 SYS_SUBP498 1 3 1,341 1,341 1 1 3 YES NO 1,341 06-30-200 UN_T1 Q2 SYS_SUBP499 1 3 1,072 1,072 1 1 3 YES NO 1,072 06-30-200 UN_T1 SYS_SUBP500 1 4 1,784 1,784 1 1 4 YES NO 1,784 06-30-200
以上是“数据库中如何查看统计信息”这篇文章的所有内容，感谢各位的阅读！相信大家都有了一定的了解，希望分享的内容对大家有所帮助，如果还想学习更多知识，欢迎关注创新互联行业资讯频道！
本文标题：数据库中如何查看统计信息
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