In Oracle Database 12c Release 1 the concept of multitenant environment has been introduced. The multitenant architecture enables an Oracle database to function as a multitenant container database (CDB) that includes zero, one, or many customer-created pluggable databases (PDBs). A PDB is a p...
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This article is based on Oracle Database 19c; for earlier versions such as 12c some differences may exist. As a preliminary setup before we learn how to add a column to table, install Toad for Oracle, create an instance of Oracle Autonomous Database 19c (or other) and connect to the d...
Note: As of July 2023, both the Virtual Machine method and a Docker container do not work on the M1 or M2 Mac computers. The best way that I’ve found is to set up an Oracle Cloud Free Tier database and connect to it from your local SQL Developer application. I’ve described how ...
要检查Oracle 19c数据库中的表空间信息,可以按照以下步骤操作: 登录到Oracle 19c数据库: 你需要使用合适的数据库连接工具(如SQL*Plus、SQL Developer等)连接到Oracle 19c数据库。 使用合适的系统或用户权限: 查询表空间信息通常需要具有DBA权限的用户或者至少是具有查询数据字典视图权限的用户。 查询数据字典视图以获...
Oracle Database 19c introduces a new option: JSON patching with JSON_mergepatch. This only replaces the relevant section of the document. Just specify the attribute you want to update and its new value. So instead of having to write the whole document, you can change just the department's...
From Oracle database 23ai (23.7) onward we can use the DBMS_SPACE package to shrink a smallfile tablespace to reclaim unused space. Data Redaction (DBMS_REDACT) Enhancements in Oracle Database 23ai (23.6) This article demonstrates a number of the enhancements to Data Redaction in Oracle Data...
There are many tricks to generate rows in Oracle Database. The easiest is the connect by level method: You can use this to fetch all the days between two dates by: * Subtracting the first date from the last to get the number of days * Generate this man
Steps to configure Transparent Data Encryption – TDE in Oracle 19c and enable auto login. STEP 1: Create pfile from spfile in below location. $ORACLE_BASE/admin/db_unique_name/pfile SQL> create pfile='/scratch/app/oracle/admin/umtqa/pfile/initumtqa7may.ora' from spfile; ...
The Auto Indexing feature recently introduced with Oracle Database 19c allows you hand over some of the decisions about index management to the database and enables you (the DBA) to focus on other more-pressing challenges. This automation capability can detect the need for indexes, create them...