工作中常用命令参考,收集如下: 查询表大小:select table_name, data_length from information_schema.tables where table_schema='testTable'; 查询表行数(基于information_schema)SELECT t.TABLE_SCHEMA,t.TABLE_NAME,t.TABLE_ROWS,t.CREATE_TIME,t.UPDATE_TIME FROM information_schema.TABLES
select schemaname,tablename,pg_relation_size(schemaname||'.'||tablename) as tabsize from pg_tables order by 3 desc; select schemaname,tablename,pg_table_size(schemaname||'.'||tablename) as tabsize from pg_tables order by 3 desc;
IF OBJECT_ID('tempdb..#TB_TEMP_SPACE') IS NOT NULL DROP TABLE #TB_TEMP_SPACE GO CREATE TABLE #TB_TEMP_SPACE( NAME ) ,ROWS INT ,RESERVED ) ,DATA ) ,INDEX_SIZE ) ,UNUSED ) ) GO SP_MSFOREACHTABLE 'INSERT INTO #TB_TEMP_SPACE exec sp_spaceused ''?''' GO S
The vacuum_freeze_min_age setting determines the youngest XID which will be changed to FrozenXID on data pages which are being vacuumed anyway. The advantage of setting it low is that far more XIDs will already be frozen when the data page is finall
一.查询表大小,块多少语句 Select SEGMENT_Name,BYTES,BLOCKS,Extents From dba_segments Where segment_name In('BAI_NEW_SESSION_HISTORY2') order by segment_name; (2)查表空间 Select Tablespace_Name, Sum(bytes)/1024/1024 From Dba_Segments group By Tablespace_Name (3)可以用输入
check Archiving processing 查看日志归档情况 db2 "SELECT DATE(CAST(START_TIME as TIMESTAMP)) as DATE, count(*) as NUMBER_OF_LOGS_PER_DAY, (count(*)*23.4375) as AMOUNT_LOGS_DAY_MB, DBPARTITIONNUM as DBPART FROM SYSIBMADM.DB_HISTORY WHERE operation = 'X' -- Arc
在需要备份数据库里面的数据时,我们需要知道数据库占用了多少磁盘大小,可以通过一些sql语句查询到整个数据库的容量,也可以单独查看表所占容量. 1.要查询表所占的容量,就是把表的数据和索引加起来就可以了 select sum(DATA_LENGTH)+sum(INDEX_LENGTH) from information_schema.tables where table_schema='数据库名'; 上面获取的结果是以字节为单位的,可以通过%1024在%1024的到M为单位的结果. 2.查询所有的
转载自http://blog.csdn.net/cuker919/article/details/8514253 select segment_name, bytes as 大小 from user_segments where segment_type = 'TABLE' and segment_name in ('VIEW_JLZDH_MP_DL_DAY_01','VIEW_JLZDH_MP_DL_DAY_02','VIEW_JLZDH_MP_DL_DAY_03', 'VIEW_JLZDH_
oracle 查询表的大小,表空间的使用情况,默认表空间 oracle 查询表的大小,表空间的使用情况,默认表空间 --查看某张表占用磁盘空间大小 ( 表名大写 ) Select Segment_Name,Sum(bytes)/1024/1024 From User_Extents Group By Segment_Name having Segment_Name='表名'; 查看用户默认表空是那个 select username,default_tablespace from dba_user
有两种含义的表大小.一种是分配给一个表的物理空间数量,而不管空间是否被使用.可以这样查询获得字节数: select segment_name, bytes from user_segments where segment_type = 'TABLE'; 或者 Select Segment_Name,Sum(bytes)/1024/1024 From User_Extents Group By Segment_Name 另一种表实际使用的空间.这样查询: analyze table emp c
