explain questions on database- Savvy Essay Writers | savvyessaywriters.net

I have these questions on Database exam please simple English without plagiarism in your own words

1- Define lock

2- The difference between data and database

3- The difference between physical and logical database

4-The difference between System and User tables

5- What is Constraint (PK, FK, and not null)

6- ACID (atomic and isolation)(consistency and durability)

7- CRUD operations (Left & Right Join & Inner Join)

8-How do you do a design of a DB (Normalization)

9- what is joint and kinds and type of attribute

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