How to distinguish database views and tables
Database views and tables are two different concepts in the database, with different characteristics and uses. Tables are entities that actually store data in the database, while views are virtual entities derived from one or more tables. Tables are used to present and manipulate data in specific ways. Tables have higher data persistence, while views provide more flexible and convenient data access.
# Operating system for this tutorial: Windows 10 system, Dell G3 computer.
Database views and tables are two different concepts in the database, and they have different characteristics and uses.
-
Table:
- Table is the basic organizational form for storing data in a database, consisting of rows and columns.
- The table has an actual storage structure and is used to store and manage actual data.
- The data in the table can be processed and managed through operations such as addition, deletion, modification, and query.
- Tables can contain constraints such as primary keys and foreign keys to ensure data integrity and consistency.
- Through tables, data can be directly operated and processed.
-
View:
- A view is a virtual table derived from one or more tables and has no actual storage structure of its own.
- Views are built based on table query results and can aggregate, filter, or calculate data from multiple tables and present it to users.
- View provides a visual operation interface for part or all of the data. The view can hide the complex structure of the underlying table and simplify the user's access to the data.
- Views can restrict access based on user permission settings to protect the security of sensitive data.
- The view does not store actual data, it is just a dynamically generated result set. The real-time nature of the data depends on the data changes in the underlying table.
In summary, a table is an entity that actually stores data in a database, while a view is a virtual table derived from one or more tables and used to view data in a specific way. Present and manipulate data. Tables have higher data persistence, while views provide more flexible and convenient data access.
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