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Types of Keys in SQL
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#1
There are many keys used in SQL for various reasons. Here are the major types of keys:
  • Super Key
  • Candidate Key
  • Primary Key
  • Alternate Key
  • Secondary Key
  • Foreign Key
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#2
We usually use Primary key and Foreign key a lot in our projects. The other keys are not yet used by me. But thanks for the information.
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