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丸趣 TV 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！
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
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
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)
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