What are the differences between database views and tables?

There are five differences between database views and tables in the database: 1. Views do not store data, but tables are objects that actually store data; 2. The data in views is a virtual table, and the data in the tables Can come from multiple sources; 3. The view inherits the structure of the query statement, while the table has its own structure definition; 4. The view is not updateable, while the table allows direct operations on it; 5. The view is based on the permissions of the underlying table, while the table has own access rights.

# Operating system for this tutorial: Windows 10 system, Dell G3 computer.

There are the following differences between database views and tables in the database:

1. Storage method: The table is the object that actually stores the data, and the data is stored in the form of rows and columns. in the table. The view does not store data, it just saves the definition of a query.

2. Data source: The data in the table can come from multiple sources. Data can be manually inserted, updated, or deleted, or related operations can be performed through other tables. The data of the view is retrieved from one or more tables based on specific query statements. It is actually a virtual table.

3. Structure definition: The table has its own structure definition, including column names, data types, constraints, etc. The view inherits the structure of the query statement, including selected columns, conditions, etc.

4. Update operation: The table allows direct insertion, update, and deletion operations, and the data in the table can be modified. In most cases, views are not updatable, that is, direct insertion, update, and deletion operations cannot be performed on the view unless some specific conditions are met.

5. Access permissions: The table has its own access permissions, which can be authorized to allow or prohibit user operations on the table. Views can also set access permissions, but they are based on the permissions of the underlying table.

In summary, tables are physical objects used to store and operate actual data in the database, while views are virtual tables defined based on query statements, providing customization of data. access. Views can simplify complex query operations and ensure data security, while providing a way to logically divide data.

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