在系统表user_tables中也可以看到segment_treated的字段里是“NO”或者“YES”说明了某张表是否分配了segment。说白了是为了可以节省少量的空间。 用下面的SQL语句查询,可以发现没有导出的表其 segment_created 字段值都是 'NO'。 Select segment_created,table_name from user_tables where segment_created = 'NO'...
举比例如以下: SQL> Gruant dba to scott SQL> create table test(name char(10)); Table created. SQL> create table system.test(name char(10)); Table created. SQL> insert into test values(‘scott’); 1 row created. SQL> insert into system.test values(‘system’); 1 row created. SQL>...
–ORACLE_SIDrun1.sql spool C:ORACLE8IadminORACLE_SIDcreatecreatedb1 set echo on connect INTERNAL/oracle ALTER DATABASE DATAFILE ‘C:ORACLE8IoradataORACLE_SIDsystem01.dbf’AUTOEXTEND ON; CREATE ROLLBACK SEGMENT SYSROL TABLESPACE “SYSTEM” STORAGE (INITIAL100K NEXT 100K); ALTER ROLLBACK SEGMENT “...
第一个问题很好解答,只要表里边曾经存在过数据,那么ddl的属性会自动变成“SEGMENT CREATION IMMEDIATE”,无论deferred_segment_creation是不是true 测试如下(需要使用非SYS用户): 16:27:59SYS@xxxxdb(79)>show parameter deferred_segment_creation NAME TYPE VALUE--- --- ---deferred_segment_creation boolean TRUE...
当数据库中含有空表时,需要先设置参数DEFERRED_SEGMENT_CREATION为FALSE,然后使用ALLOCATE EXTENT为每一个空表分配段,最后再导出所需要的数据。另外,对于分区表而言,即使没有创建段(无论是整个分区还是个别子分区没有创建段,可以使用DBA_TAB_PARTITIONS.SEGMENT_CREATED来查询是否创建了段),也不存在丢失分区表或丢失某...
SEGMENT_CREATED VARCHAR2(3) RESULT_CACHE VARCHAR2(7) CLUSTERING VARCHAR2(3) ACTIVITY_TRACKING VARCHAR2(23) DML_TIMESTAMP VARCHAR2(25) HAS_IDENTITY VARCHAR2(3) CONTAINER_DATA VARCHAR2(3) INMEMORY VARCHAR2(8) INMEMORY_PRIORITY VARCHAR2(8) ...
segment_created(optional): string sharded(optional): string skip_corrupt(optional): string status(optional): string table_lock(optional): string table_name(optional): string tablespace_name(optional): string temporary(optional): string user_stats(optional): string...
--- ---OWNERNOTNULLVARCHAR2(30)-- ALL_TABLES比USER_TABLES多了一列OWNER,以指明该表属于哪个用户-- 但除此以外表机构几乎一致TABLE_NAMENOTNULLVARCHAR2(30)TABLESPACE_NAME VARCHAR2(30)CLUSTER_NAME VARCHAR2...READ_ONLY VARCHAR2(3)SEGMENT_CREATED VARCHAR2(3)RESULT_CACHE VARCHAR2 1. 2. 3. 4...
selectdr.tablespace_name, dr.segment_name, vr.statusfromdba_rollback_segs dr, v$rollstat vrwheredr.segment_id=vr.usn; 确实无误后,执行删除原有UNDOTBS1, droptablespaceUNDOTBS1includingcontentsanddatafiles; 再查看, SELECT*FROMDBA_DATA_FILES; ...
[oracle@redhat4 bdump]$ cat alert_jiagulun.logMon Apr 11 13:38:53 2016Starting ORACLE instance (normal)LICENSE_MAX_SESSION = 0LICENSE_SESSIONS_WARNING = 0Shared memory segment for instance monitoring createdTue Nov 21 06:45:15 2017MMNL absent for 63369 secs; Foregrounds taking overMMNL absen...