Concept A view is a virtual table. For users who use the view, it is basically the same as using a normal table. The view does not exist in the database, and the data in the view is dynamically generated. The advantages of views over ordinary tables: Simplicity: When using views, you do not need to care about the corresponding structural conditions of subsequent tables. For users, views are filtered result sets. Security: Users can only access the result sets they are allowed to query. Data independence: Once the view structure is determined, changes to the actual tables have no impact on view users. View operations View operations include creating views, modifying views, deleting views, and viewing view definitions. Create view, modify view#Create view create [or replace] [algorithm={undefined|merge|temptable}] view view_name[(column_list)] as select_statement [with[cascaded|local] check&n
1. Introducing the concept and operation of views in mysql
Introduction: A view is a virtual table. For users who use the view, it is basically the same as using a normal table. The view does not exist in the database, and the data in the view is dynamically generated. The advantages of views over ordinary tables: Simplicity: When using views, you do not need to care about the corresponding structural conditions of subsequent tables. For users, views are filtered result sets. Security: Users can only access the result sets they are allowed to query. Data independence: Once the view structure is determined, changes to the actual tables have no impact on view users. View operations View operations are divided into creation...
2. Detailed explanation of view instances in Mysql
Introduction: Views in mysql have many similarities with tables. Views are also composed of several fields and several records. Views can also be used as the data source of select statements.
3. What is a view in Mysql? Detailed explanation of views in Mysql
##Introduction: Views in mysql, views and tables have many similarities Where, the view is also composed of several fields and several records. The view can also be used as the data source of the select statement
4. Detailed explanation of view update in mysql
Introduction: The updateability of a view is related to the definition of the query in the view. 1. Those in mysql that try to make it non-updatable of? The following types of views are not updatable 1. SQL statements containing the following keywords: aggregate functions (sum, min, max, count), distinct, group by, having, union or uinon all 2. Constant views 3. Select contains sub Query 4.join5.from a non-updatable view 6.wh
5. The use of views in MySQL and the skills of multi-table INNER JOIN_MySQL
Introduction: The use of views in MySQL and the skills of multi-table INNER JOIN
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