Wednesday, March 24, 2010

SQL Interview Questions

  • What is a Key?
  • Types of Key?
  • What is Primary Key?
  • What is Secondary Key?
  • What is Unique Key?
  • What is Foreign Key?
  • What is Composite Key?
  • What is Surrogate Key?
  • What is Candidate Key?
  • What is Alternate Key?
  • Difference between Primary & Unique key?
  • Difference between Primary & Alternate & Secondary key?
  • Difference between Primary & Foreign Key?
  • What is the need of Composite key?

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