Running the (Segment) Space Advisor - on a Partitioned Table
Here is a quick demo on running the Segment Space Advisor manuallyI need to start with the ADVISOR privilege$sqlplusSQL*Plus: Release 12.2.0.1.0 Production on Sat Jan 18 22:02:10 2020Copyright (c)...
View ArticleBasic Replication -- 12 : MV Refresh Captured in AWR
Building on the example of an Index having been created on a Materialized View in my previous blog post in this series, I've captured some information from the AWR report in 19c when this code is...
View ArticleBasic Replication -- 13 : Some Interesting SYS tables
I found an interesting SQL in the AWR report from my previous blog post.What do you think this SQL statement does ?DELETE FROM SYS.MVREF$_STMT_STATS WHERE REFRESH_ID = :B2 AND MV_OBJ# = :B1Here are...
View ArticleQuickly creating a Standby Database in 19c
A quick overview1. Create the parameter file initSTDBYDB.ora with additional parameters change or add DB_UNIQUE_NAME to be STDBYDB change the location of control files add fal_server to be the...
View ArticleRedo Shipping for Standby Database in 19c
Following my previous post, here is some setup information :Relevant database instance parameter(s) for the Primary database...
View ArticleUsing FLASHBACK DATABASE for [destructive] D.R. Testing
Testing your Disaster Recovery strategy with an Oracle Standby Database can be at different "levels" for the database :1. Graceful Switchover to the D.R. site and reversing roles between the two...
View ArticleMy Posts on Basic Replication
My series of Blog Posts on Basic Replication :1. 1. Introduction (Aug-19)2. 2a. Elements for creating a Materialized View (Aug-19)3. 2b. Elements for creating a Materialized View (Sep-19)4. 3....
View ArticleRestoring a lost Datafile on a Standby Database and knowing about V$RECOVER_FILE
Continuing with my configured Standby database ....how to restore a lost datafile in the Standby [when there is no backup on the Standby server and no backup recently taken or planned on the Primary...
View ArticleV$RECOVER_FILE and PDB$SEED and Standby Database
As a follow up to my previous post where I showed, with other things, that V$RECOVER_FILE may show PDB$SEED files as well, this is what I currently see on my Production (Primary) database :SQL> l 1...
View ArticleRMAN Backup of a Standby Database
A Standby Database can be backed up even when Recovery is in progress. The ArchiveLogs at the Standby can also be backed up.STDBYDB>sqlplus '/ as sysdba'SQL*Plus: Release 19.0.0.0.0 - Production on...
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Restoring a Datafile into ASM
What happens to the file name when you restore a datafile into RAC ?I create a new tablespace and datafile.I then make a backup of the tablespace/datafileI shutdown the database and remove the datafile...
View ArticleINSERTing a row with or without NULL explicitly ?
Here's something I've wanted to explore.Say you have a table with a column that is not NOT NULL -- i.e. it does allow NULLs.When you issue an INSERT statement, you can eithera. Explicitly specify a...
View ArticleDatafile in a PDB added but not backed up
(I think I've covered this with a pre-12c non-PDB example earlier, but this demo is with a 12c PDB)What happens if you add a datafile to a PDB and then lose it without having a backup of the datafile...
View ArticleFull Recovery of Standby Database over the network
Say that your Standby database is lagging behind the Primary database.You coulda. Fetch and apply all the ArchiveLogs required to cover the lagb. Take an Incremental Backup from the Primary and apply...
View Article"Long Term Support Release" vs "Innovation Release"
Too often, IT departments implement and then get stuck on software releases that do not get long term support. There is no harm upgrading to a new release that is an intermediate if you plan to...
View ArticleA Correlated SubQuery
I take this simple Correlated Subquery that identifies all employees whose Salary is greater than the department's average Salary and is also greater than $9,000SQL> l 1 select emp.department_id,...
View ArticleAdding a Function-Based Index
What happens when you create a Function Based Index ?{This demo is in 12.2}I start with my "large" table.SQL> create table my_data_table 2 as select * from dba_objects 3 union all select * from...
View ArticleA Function Based Index : 2
Here's another Function Based Index example.  This is in 19.3 (not to demonstrate any difference between 12.2 and 19.3 here)SQL> create table employees 2 (employee_id number primary key, 3...
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SQL Developer 20.2 connected to Oracle ATP on the Cloud
Screenshot from SQL Developer on my desktop :Screenshot from ATP Overview page :Performance Metrics for a specific SQL Statement, captured by the Real Time SQL Monitor in SQL Developer :
View ArticleArchive Log Deletion Policy with a Standby Database
Previously, I have blogged about Archive Log Deletion Policy even when a Standby database is not present.Here's a 19c example with a Standby DatabaseI first set it to "APPLIED ON ALL STANDBY" meaning...
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