seg_bytes_mb, 2)) * 100) || '%' frag_percent from dba_tables a, (select owner, segment_name, sum(bytes / 1024 / 1024) seg_bytes_mb from dba_segments group by owner, segment_name) b where a.table_name = b.segment_name and a.owner = b.owner and a.owner not in ('SYS',...
“A schema is a collection of database objects. A schema is owned by a database user and has the same name as that user. Schema objects are the logical structures that directly refer to the database's data. Schema objects include structures like tables, views, and indexes.(There is no ...
oracle中用户和schema,一个用户对应唯一一个schema,用户相当于登录账号,schema相当于这个账号的数据库表的集合,在创建用的时候,会默认生成一个缺省的schema,名字以用户名来命名。
Oracle 11G RAC 集群迁移到 DM 连接 Oracle 端时报错:Listener refused the connection whth the following error:ORA-12505, Thn:listener does not currently know of SID Giver in connect descriptor。【问题解决】出现此报错需要指定 Oracle 驱动,自定义 url:jdbc:oracle:thin:@(DESCRIPTION=(ADDRESS_LIST=(...
SELECT * FROM test_info.datatypelist_after; Oracle数据库中的模式迁移完成后,会在GaussDB库中作为Schema,所以查询语句中添加Schema精确查询。 如图所示,查询表中的各个数据类型都迁移成功,并且数据正确无误。验证增量同步。 由于本次迁移为“全量+增量”同步模式,全量同步完成后,如果在创建任务后有数据写入,这些写...
-n <db_name> Database name (DB_NAME), if different from the unique name given by the -d option -y <dbpolicy> Management policy for the database (AUTOMATIC, MANUAL, or NORESTART) -g "<serverpool_list>" Comma separated list of database server pool names -a "<diskgroup_list>" Comma...
方法2: 使用expdp/impdp,导出表然后导入表修改表的Schema。使用exp/imp方式也是差不多,在此不做介绍。 [oracle@DB-Server dpdump]$ expdp system/xxxx tables=test.kkk directory=data_pump_dir dumpfile=kkk.dmp logfile=kkk.log; Export: Release 11.2.0.1.0 - Production on Mon Jul 10 15:57:22 2017 ...
| CLUSTER [ schema. ]cluster } { COMPUTE [ SYSTEM ] STATISTICS [for_clause] | ESTIMATE [ SYSTEM ] STATISTICS [for_clause][SAMPLE integer { ROWS | PERCENT }] | validation_clauses | LIST CHAINED ROWS [ into_clause ] | DELETE [ SYSTEM ] STATISTICS ...
--user_tables: 当前用户名下的表的信息 查看有哪些表空间: select tablespace_name from dba_tablespaces; select tablespace_namefrom dba_tablespaces where tablespace_name not in ('SYSTEM','SYSAUX','USERS','UNDOTBS1') and contents not in ('TEMPORARY') ...
SI_INFORMTN_SCHEMA WMSYS 由于SCOTT 使用了默认口令 TIGER,因此您会看到他出现在上面的清单中。使用下面的语句进行更改: SQL> alter user scott identified by tiger1; User altered. 现在,如果您查看该视图: SQL> select * from dba_users_with_defpwd; ...