I am using the query bellow to check the usage of tablespaces in my oracle DBs: select t.tablespace_name, t.size_mb, f.free_mb, round((f.free_mb*100)/t.size_mb,2) percent_free from (select tablespace_name, round(sum(bytes)/1024/1024,2) size_mb from dba_data_files group by t...
install oracle goldengate 12c on linux 7 67323 0 How to run SQL tuning advisor for a sql_id 65246 9 Transparent Data Encryption (TDE) in oracle 12c 55357 2 How to drop and recreate temp tablespace in oracle 55227 8 ORA-01624: log 1 needed for crash recovery of instance 52109 2 ORA-2...
The expression to be aggregated can be any Oracle Materialized Views & Query Rewrite Page 8 SQL value expression that does not contain a subquery or nested aggregate function. The materialized view can have its own storage specification so that you can specify in which tablespace it is to be ...
This still doesn't guarantee that your query will use that index, that depends also on selectivity of the query, if the query is highly selective (returns only a few rows), then oracle will probably use the index, but when the query is not selective (returns thousands of rows), than th...
删除文件的语句。 这包括CREATE TABLE,CREATE TABLESPACERENAME TABLE和DROP TABLE语句。 帐户管理语句,例如CREATE USER,ALTER USER,DROP USER和GRANT。 不其更改记录到重做日志的DDL语句。 ,这包括添加索引。 使用 INSTANCE FOR BACKUP语句创建备份锁,并使用 INSTANCE语句释放该锁。 它需要BACKUP...
Query DBA_EXTENTS for Tablespace name,Owner of the segment : DBA_EXTENTS « System Tables Views « Oracle PL / SQL
In thesystenant or a user tenant, you can execute theSHOW VARIABLESstatement to query the variable at the session level or query theSYS.TENANT_VIRTUAL_SESSION_VARIABLE(in Oracle mode) orinformation_schema.SESSION_VARIABLES(in MySQL mode) view for the variable at the session level. ...
扫描表中的所有行来查找所需数据行。有时候表扫描又可称表空间扫描(Tablespace Scan),因为有的系统上的数据库系统允许一个Extent上存在不同的表数据,用表扫描表述不准确。 索引扫描 (Index Scan) 通过扫描索引来定位所需数据行。索引扫描的情况非常复杂,又分为唯一索引扫描,非匹配索引扫描,匹配索引扫描,只扫描索引...
SELECT first_name, last_name FROM hr.employees WHERE department_id IN (SELECT department_id FROM hr.departments WHERE location_id = 1800); See Also: "View Merging" Oracle Database Conceptsfor an overview of SQL processing 4.1.3.2Query Subplans ...
Connect to Oracle Database as a local user. Log in to SQL*Plus as the SYS user, connecting as SYSDBA: Copy conn sys/password as sysdba Copy CREATE TABLESPACE tbs1 DATAFILE 'tbs5.dbf' SIZE 20G AUTOEXTEND ON EXTENT MANAGEMENT LOCAL SEGMENT SPACE MANAGEMENT AUTO; Copy SET ECHO ON SET FEED...