Linux SQL database servers

Two of the popular Linux SQL databases are MySQL and Postgres. You can establish relationships with these. For example customer and customer purchases tables can be linked together to ensure that customer purchase record has corresponding customer record.

Advantage of doing so is integrity of the data. Disadvantage of doing it is reduced performance to verify integrity of the data.

If more and more records are created and volume of traffic increase than it is needed to get a faster machine. It is called vertical scaling.

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