Thanks for the lesson. Here is what i understood ,so we have 4 types of Databases:
1,Relational -SQL
2.Key-Value -No SQL-Moong DB
3, Multi-relational/complex (data mining)-Graph
4. Blockchain-Append only. public(some are private), immutable database,
Is this correct for now. Can Graph be used for Data mining. Thanks
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Iâm a bit confused. In the intro to databases video, isnât the example of who visited the restaurants also a ârelations SQLâ? Wouldnât it be the same as retrieving a friendâs friend from Facebook? Instead of for example âshow me which restaurant my friend went to that I havenât been toâ youâd inquire âshow me which friend my friend has that I donâtâ? Could it be because in the resto case, the datagroups ârestoâ and âpersonâ were different whereas in my facebook example âfriendsâ and âmeâ are in the same datagroup?
yes, indeed it is, from a âvisitedâ database to clients database.
Carlos Z
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very interesting lecture! thx