MYSQL Console Q&A #3 What is a Primary Key? What does NULL mean

Опубликовано: 05 Февраль 2025
на канале: How to code well

161

In the second MYSQL Console Questions and Answer episode we take a look at a question from Benham Anisi.

Benham Anisi asks:
What does a primary key do?
What does NULL mean when adding a default field to a table

So in this episode we are going to take a look at each of these questions and and discuss the answers.

This MYSQL Q&A covers 2 examples:
What a Primary is and how it is used when executing a MYSQL query
What NULL means and how it is used with the columns default filed.

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How to change default fields in a table schema:
   • MYSQL Console Tutorial #7 How to chan...

How to change the extra value in a tables schema:
   • MYSQL Console Tutorial #8 How to chan...

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