The cornerstone of reliable databases is the ACID principle:

  • Schema: The blueprint or structure of the database (defines how data is organized).
  • Primary Key: A unique identifier for a specific row in a table.
  • Foreign Key: A field in one table that links to the primary key in another table (used to create relationships).

    • Transaction 1 and Transaction 2 happen at the same time, but they act like they are happening sequentially. They don't mess up each other's math. database

    The first computers used punch cards. Then came the first DBMS: the navigational database. Think of a tree structure (Hierarchical) where a parent has many children, but a child cannot have two parents easily. The cornerstone of reliable databases is the ACID principle:

    To understand modern databases, you must know where they came from. Schema: The blueprint or structure of the database

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    The cornerstone of reliable databases is the ACID principle:

  • Schema: The blueprint or structure of the database (defines how data is organized).
  • Primary Key: A unique identifier for a specific row in a table.
  • Foreign Key: A field in one table that links to the primary key in another table (used to create relationships).

    • Transaction 1 and Transaction 2 happen at the same time, but they act like they are happening sequentially. They don't mess up each other's math.

    The first computers used punch cards. Then came the first DBMS: the navigational database. Think of a tree structure (Hierarchical) where a parent has many children, but a child cannot have two parents easily.

    To understand modern databases, you must know where they came from.