This week's book giveaway is in the Spring forum.
We're giving away four copies of Spring in Action (5th edition) and have Craig Walls on-line!
See this thread for details.
Win a copy of Spring in Action (5th edition) this week in the Spring forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other all forums
this forum made possible by our volunteer staff, including ...
  • Campbell Ritchie
  • Bear Bibeault
  • Devaka Cooray
  • Liutauras Vilda
  • Jeanne Boyarsky
  • Knute Snortum
  • Junilu Lacar
  • paul wheaton
Saloon Keepers:
  • Ganesh Patekar
  • Frits Walraven
  • Tim Moores
  • Ron McLeod
  • Carey Brown
  • Stephan van Hulst
  • salvin francis
  • Tim Holloway

difference between instance and schema in dbms  RSS feed

Ranch Hand
Posts: 220
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
hi, please tell the what are instance and schema incase of dbms? please explain me with some e.g.
i googled for schema, it says no. of records, data type, attributes, etc... does it mean that schema is another name of table?
author & internet detective
Posts: 38911
Eclipse IDE Java VI Editor
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
No. A schema is a group of tables owned by the same user. For example I could have "vinod" schema and "jeanne" schemas in the same database instance. Each could have a "test" table because the schema gives a different namespace. Like a package does in Java.

A database instance is even higher level. Kind of like a separate database except it shares the same binaries. You can have the "vinod" schema in both database instances because they are separate.
It is sorta covered in the JavaRanch Style Guide.
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!