1) 字段 last_analyzed 值就是 表最后一次的统计更新的日期,如果为 null 则表示 该表没有被分析过,即没有统计信息。2) 新建的表是没有统计信息的。2.2 plsqldesc dbms_stats.get_table_stats --Default Y表示有默认值,则可以不给IN参数,OUT参数总是要给变量的desc dbms_stats.get_column_stats...
, S.LAST_ANALYZEDFROMDBA_TAB_STATISTICS SINNERJOINDBA_TABLES TONS.OWNER=T.OWNERANDS.TABLE_NAME=T.TABLE_NAMEWHERE(S.STALE_STATS='YES'ORS.LAST_ANALYZEDISNULL)-- STALE_STATS = 'YES' 表示统计信息过期:当对象有超过10%的ROWS被修改时-- LAST_ANALYZED IS NULL 表示该对象从未进行过统计信息收集ANDT....
for i in (select owner, table_name, last_analyzed, num_rows from dba_tables where owner in ('K3CLOUD3','K3CLOUD') and temporary='Y' and last_analyzed is not null and last_analyzed < (sysdate - 1/288) order by owner, table_name) loop begin dbms_stats.delete_table_stats(i.owner...
max(decode(position, 1, column_name, null)) cname1, max(decode(position, 2, column_name, null)) cname2, max(decode(position, 3, column_name, null)) cname3, max(decode(position, 4, column_name, null)) cname4, max(decode(position, 5, column_name, null)) cname5, max(decode(posit...
该统计值为前32字节的16进制表示法 HIGH_VALUE 同上一字段 DENSITY NUM_NULLS NUM_BUCKETS LAST_ANALYZED SAMPLE_SIZE CHARACTER_SET_NAME CHAR_COL_DECL_LENGTH GLOBAL_STATS USER_STATS AVG_COL_LEN 本文参与腾讯云自媒体同步曝光计划,分享自作者个人站点/博客。
WHERE LAST_ANALYZED IS NULL OR STALE_STATS = 'YES' AND OWNER = 'XEZF' 一般情况下,当表分析以后,在查看dba_tables 表的num_rows 列时会显示表中记录数,我们可以拿这个数值与count(*) 的结果进行比较,如果2者相差较大,就说明,该表的统计信息陈旧,需要去收集统计信息。
-- columnsselect column_name, last_analyzed "analyze time", num_distinct, num_nulls, densityfrom user_col_pending_statswhere table_name = '&1' and partition_name is nullorder by column_name;返回主题列表测试正在审核的统计信息 CUSTOMERS_OBE 表上的所有统计信息都正在审核。如果要测试新的统计信息...
where (LAST_ANALYZED is not null and num_rows > 10000 ) or TABLE_NAME='T_BAS_ATTACHMENT' order by 5 desc) inner1 where rownum < 51; BEGIN select to_char(sysdate, 'yyyy_mm_dd') into v_date from dual; v_text := 'create table TABLEINFO_DB_' || v_date || '(OWNER varchar2(...
where owner=upper(aSchemaname)and index_typein('NORMAL','NORMAL/REV','FUNCTION-BASED NORMAL')and partitioned='NO'and temporary='N'and dropped='NO'and status='VALID'and last_analyzed is notnullorder by owner,table_name,index_name)LOOPIFr.leaf_blocks>vMinBlksTHENinspect_index(r.index_owner...
Script. bde_last_analyzed.sql provided in this Note can be used on any 8i, 9i, 10g, 11g or higher database, including Oracle Apps 11i and R12 instances 如果是ERP数据库,则用APPS连接,否则用其他任何SYS权限用户连接都可以 #sqlplus <user>/<pwd> ...