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🔧 What Is a Primary Key in SQL? Learn with Examples


Nachrichtenbereich: 🔧 Programmierung
🔗 Quelle: dev.to

A primary key is a column in a database table that uniquely identifies each row.
That means no two rows can have the same value in this column, and it can’t be left empty.

It’s the most important... [Weiterlesen]

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