4 ms·

Two is quite relevant for relationships

• ChickeNES 4y ago
  Well, if you ignore polyamory and polygamy...
• layer8 4y ago
  You can have n-ary relationships. Relational databases are built on that.
  • grensley 4y ago
    What are the columns in a relational table like that?
    • layer8 4y ago
      Not sure what you mean. A table with N columns corresponds to an N-ary relation. The rows contained in the table are the tuples contained in the relation. Table = relation. That's why it's called a relational database. See also this example in Wikipedia of a ternary relation: https://en.wikipedia.org/wiki/Finitary_relation#Example https://en.wikipedia.org/wiki/Finitary_relation#Example Another example: If you have a table (SSN, Name, DateOfBirth), then that corresponds to the relation "person with SSN x has name y and date of birth z". In that case it's a relation between SSNs, names, and dates.
      • grensley 4y ago
        Very fair, thanks for the example.