数据库中如何查看统计信息-创新互联
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!
创新互联是一家专注于成都网站制作、做网站与策划设计,扶绥网站建设哪家好?创新互联做网站,专注于网站建设十年,网设计领域的专业建站公司;建站业务涵盖:扶绥等地区。扶绥做网站价格咨询:18980820575set 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
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