• iii@mander.xyz
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    6 hours ago

    In the context of this tweet most important differences are:

    SQL is a language for querying databases.

    Most common used databases are relational databases. With relational databases you can setup, well, relations and constraints.

    Imagine you have 2 tables (2 excel sheets) one with people, and one with home ownership. You can set the following constraint: (1) each person shows up only once in the people table. And the following relation: (2) every home owner must refer to an existing person in people table.

    When modifying the table contents, the system checks if no constraints or relations are violated.

    Excel, just like a badly designed relational databse, would, for example, have no problem with duplicate people, or home ownership referring to non-existant people.

      • Adalast@lemmy.world
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        39 minutes ago

        The big difference between the a relational database and a spreadsheet is that “can do” clause in your sentence. In a relational database they MUST have those constraints to be related.

        In the Microsoft ecosystem Access is the relational database. Excel is a table manager with fancy features.