Home > Ask the Oracle Experts > Database Design and Architecture Questions & Answers > Can I drop a column in SYS schema?
Ask The Oracle Expert: Questions & Answers
EMAIL THIS

Can I drop a column in SYS schema?

Brian Peasland EXPERT RESPONSE FROM: Brian Peasland

Pose a Question
Other Oracle Categories
Meet all Oracle Experts
Become an Expert for this site


Oracle tips, scripts, and expert advice
Digg This!    StumbleUpon Toolbar StumbleUpon    Bookmark with Delicious Del.icio.us    Add to Google


>
QUESTION POSED ON: 09 April 2008
I have a question about drop column features. I am not able to drop a column in SYS schema. I can drop a table in the same schema. Is it a feature of SYS schema or is there some other way to drop a column of my own table created in SYS schema?

>
EXPERT RESPONSE
You should never, never, never drop columns or tables in the SYS schema. The SYS schema is a special schema, containing the Data Dictionary. One should never drop tables or columns for Data Dictionary tables as this can lead to Data Dictionary corruption and a potentially unusable database. And one should never create their own tables in the SYS schema. If you have your own tables in the SYS schema, move them to a new schema. Then you wont have any problems dropping columns.


Digg This!    StumbleUpon Toolbar StumbleUpon    Bookmark with Delicious Del.icio.us    Add to Google


RELATED CONTENT
Database Design and Architecture
Should we worry about Oracle memory leaks on Windows?
How to disable Oracle constraints and triggers during an import in 10g
How to delete a partition on the F: drive with Oracle on Windows
What could be causing an SQL count 0 with a successful Oracle import?
What is a staging table, and how is the staging concept used in Oracle?
Tips for how to size an Oracle server
Oracle error 942 when exporting a schema
Do DDL statements roll back, and why?
Increasing Oracle storage capacity by moving to a new storage with minimum downtime
Using Undo Tablespaces vs. rollback segments in Oracle 9i, 10g

Oracle Database Administrator
What is the difference between a database engineer, architect and administrator?
Import on one table from dump file
Error during RMAN backup
STATSPACK tool: transaction vs. execution measurement
Should I port from Microsoft Access?
Installing multiple Oracle homes
How can I find statistics on total memory usage and database connections?
Modifying SYS password in a RAC environment
How to create Datafiles in a Data Guard (10g) environment
Importing tables with integrity constraints

RELATED RESOURCES
2020software.com, trial software downloads for accounting software, ERP software, CRM software and business software systems
Search Bitpipe.com for the latest white papers and business webcasts
Whatis.com, the online computer dictionary



Search and Browse the Expert Answer Center
Search and browse more than 25,000 question and answer pairs from more than 250 TechTarget industry experts.
Browse our Expert Advice



Oracle White Papers: Fusion Middleware
HomeNewsTopicsTipsAsk the ExpertsMultimediaWhite PapersProductsBlogs
About Us  |  Contact Us  |  For Advertisers  |  For Business Partners  |  Site Index  |  RSS
SEARCH 
TechTarget provides enterprise IT professionals with the information they need to perform their jobs - from developing strategy, to making cost-effective IT purchase decisions and managing their organizations' IT projects - with its network of technology-specific Web sites, events and magazines.

TechTarget Corporate Web Site  |  Media Kits  |  Reprints  |  Site Map




All Rights Reserved, Copyright 2003 - 2008, TechTarget | Read our Privacy Policy 		  TechTarget - The IT Media ROI Experts