Home > Ask the Oracle Database / Applications Experts > Oracle 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?


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



RELATED CONTENT
Oracle database design and architecture
How to use V$SEGMENT_STATISTICS to find the most accessed Oracle table
Can I install an Oracle client on Windows 7?
How to use the Oracle Database Upgrade Assistant (DBUA)
Can I specify Oracle column order in my database table?
Can I have a single Oracle 11g RAC instance across multiple databases?
How to use the Oracle export utility to duplicate database structure
How to choose the primary key columns in an Oracle table
Understanding the data archiving definition
How to plan Oracle Grid Control Repository maintenance
What Linux flavor should I use for my Linux proof of concept in Oracle?

Oracle database administrator
Understanding SQL string functions
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?
How can I find statistics on total memory usage and database connections?
Installing multiple Oracle homes
Modifying SYS password in a RAC environment
How to create Datafiles in a Data Guard (10g) environment

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


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.




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 technology professionals with the information they need to perform their jobs - from developing strategy, to making cost-effective purchase decisions and managing their organizations' technology projects - with its network of technology-specific websites, events and online magazines.

TechTarget Corporate Web Site  |  Media Kits  |  Site Map




All Rights Reserved, Copyright 2003 - 2009, TechTarget | Read our Privacy Policy 		  TechTarget - The IT Media ROI Experts